7.5
HIGH
CVSS 3.1
CVE-2026-45591
ASP.NET Core Denial of Service Vulnerability
Overview
Description
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Details
INFO
Published Date :
June 9, 2026, 5:17 p.m.
Last Modified :
July 23, 2026, 8:10 a.m.
Remotely Exploit :
No
Source :
[email protected]
Impact
Affected Products
The following products are affected by CVE-2026-45591
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45591.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45591 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45591
weaknesses.
CAPEC-147: XML Ping of the Death XML Ping of the Death
CAPEC-227: Sustained Client Engagement Sustained Client Engagement
CAPEC-492: Regular Expression Exponential Blowup Regular Expression Exponential Blowup
CAPEC-125: Flooding Flooding
CAPEC-130: Excessive Allocation Excessive Allocation
CAPEC-147: XML Ping of the Death XML Ping of the Death
CAPEC-197: Exponential Data Expansion Exponential Data Expansion
CAPEC-229: Serialized Data Parameter Blowup Serialized Data Parameter Blowup
CAPEC-230: Serialized Data with Nested Payloads Serialized Data with Nested Payloads
CAPEC-231: Oversized Serialized Data Payloads Oversized Serialized Data Payloads
CAPEC-469: HTTP DoS HTTP DoS
CAPEC-482: TCP Flood TCP Flood
CAPEC-486: UDP Flood UDP Flood
CAPEC-487: ICMP Flood ICMP Flood
CAPEC-488: HTTP Flood HTTP Flood
CAPEC-489: SSL Flood SSL Flood
CAPEC-490: Amplification Amplification
CAPEC-491: Quadratic Data Expansion Quadratic Data Expansion
CAPEC-493: SOAP Array Blowup SOAP Array Blowup
CAPEC-494: TCP Fragmentation TCP Fragmentation
CAPEC-495: UDP Fragmentation UDP Fragmentation
CAPEC-496: ICMP Fragmentation ICMP Fragmentation
CAPEC-528: XML Flood XML Flood
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45591 vulnerability anywhere in the article.
-
Zero Day Initiative
The June 2026 Security Update Review
CVE Title Severity CVSS Public Exploited XI Type CVE-2026-41091 Microsoft Defender Elevation of Privilege Vulnerability Important 7.8 Yes Yes 0 EoP CVE-2026-49160 HTTP.sys Denial of Service Vulnerabil ... Read more
Published Date:
Jun 09, 2026 (1 month, 2 weeks ago)
The following table lists the changes that have been made to the
CVE-2026-45591 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: Microsoft, Description: Consumo descontrolado de recursos en ASP.NET Core permite a un atacante no autorizado denegar el servicio a través de una red. -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 15, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_e4s:9.4::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream E4S (v.9.4)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CRB (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat CodeReady Linux Builder EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'defaultStatus': 'affected'}] [{'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el10_2', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'versions': [{'status': 'unaffected', 'version': '0:9.0.118-1.el10_2', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'versions': [{'status': 'unaffected', 'version': '0:10.0.109-1.el10_2', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet10.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10.0 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el10_0', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10.0 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '0:9.0.118-1.el10_0', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el8_10', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '0:9.0.118-1.el8_10', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '0:10.0.109-1.el8_10', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet10.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el9_8', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '0:9.0.118-1.el9_8', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '0:10.0.109-1.el9_8', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet10.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_e4s:9.4'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el9_4', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.6 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '0:8.0.128-1.el9_6', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.6 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '0:9.0.118-1.el9_6', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9.0', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '9.0.117-1.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet9-0-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '10.0.109-1.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet10-0-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '8.0.128-1.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'dotnet8-0-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_e4s:9.4::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream E4S (v.9.4)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.2'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CRB (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat CodeReady Linux Builder EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::crb'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'defaultStatus': 'affected'}] Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added Reference https://access.redhat.com/errata/RHSA-2026:17527 Added Reference https://access.redhat.com/errata/RHSA-2026:25110 Added Reference https://access.redhat.com/errata/RHSA-2026:25111 Added Reference https://access.redhat.com/errata/RHSA-2026:25112 Added Reference https://access.redhat.com/errata/RHSA-2026:25113 Added Reference https://access.redhat.com/errata/RHSA-2026:25114 Added Reference https://access.redhat.com/errata/RHSA-2026:25115 Added Reference https://access.redhat.com/errata/RHSA-2026:25220 Added Reference https://access.redhat.com/errata/RHSA-2026:25221 Added Reference https://access.redhat.com/errata/RHSA-2026:25222 Added Reference https://access.redhat.com/errata/RHSA-2026:26638 Added Reference https://access.redhat.com/errata/RHSA-2026:26994 Added Reference https://access.redhat.com/errata/RHSA-2026:28007 Added Reference https://access.redhat.com/errata/RHSA-2026:28009 Added Reference https://access.redhat.com/errata/RHSA-2026:28011 Added Reference https://access.redhat.com/errata/RHSA-2026:28051 Added Reference https://access.redhat.com/errata/RHSA-2026:28227 Added Reference https://access.redhat.com/security/cve/CVE-2026-45591 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2487224 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45591.json -
Initial Analysis by [email protected]
Jun. 19, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.9 *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.28 *cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.17 *cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* versions from (including) 18.6.0 up to (excluding) 18.6.3 Added CPE Configuration AND OR *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.9 *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.28 *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.17 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45591', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-10T13:47:51.768280Z'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Microsoft', 'product': '.NET 10.0', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': '10.0.9', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': '.NET 8.0', 'versions': [{'status': 'affected', 'version': '8.0.0', 'lessThan': '8.0.28', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': '.NET 9.0', 'versions': [{'status': 'affected', 'version': '9.0.0', 'lessThan': '9.0.17', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'ASP.NET Core 10.0', 'versions': [{'status': 'affected', 'version': '10.0', 'lessThan': '10.0.9', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'ASP.NET Core 8.0', 'versions': [{'status': 'affected', 'version': '8.0', 'lessThan': '8.0.28', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'ASP.NET Core 9.0', 'versions': [{'status': 'affected', 'version': '9.0', 'lessThan': '9.0.17', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Microsoft Visual Studio 2026 version 18.6', 'versions': [{'status': 'affected', 'version': '18.6.0', 'lessThan': '18.6.3', 'versionType': 'custom'}]}] -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.