7.5
HIGH
CVSS 3.1
CVE-2026-8932
incomplete mTLS config matching in conn reuse
Overview
Description
libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.
Details
INFO
Published Date :
July 3, 2026, 7:16 a.m.
Last Modified :
July 7, 2026, 11:18 p.m.
Remotely Exploit :
Yes !
Source :
2499f714-1537-4658-8207-48ae4bb9eae9
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 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
Update libcurl to a version that correctly checks TLS settings for connection reuse.
- Update libcurl to the latest stable version.
- Recompile applications that depend on libcurl.
- Verify TLS configuration options are checked.
Public PoC/Exploit Available at Github
CVE-2026-8932 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-8932.
| URL | Resource |
|---|---|
| https://curl.se/docs/CVE-2026-8932.html | Patch Vendor Advisory |
| https://curl.se/docs/CVE-2026-8932.json | Vendor Advisory |
| https://hackerone.com/reports/3733910 | Exploit Issue Tracking Third Party Advisory |
| https://hackerone.com/reports/3733910 | Exploit Issue Tracking Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8932 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-2026-8932
weaknesses.
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).
CVE-2026-8932
C
Updated: 1 month ago
1 stars
0 fork
0 watcher
Born at : June 26, 2026, 10:21 p.m.
This repo has been linked 1 different CVEs too.
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Updated: 1 week, 3 days ago
7922 stars
1275 fork
1275 watcher
Born at : Dec. 8, 2019, 1:03 p.m.
This repo has been linked 646 different CVEs too.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8932 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-8932 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.
-
Initial Analysis by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added CWE NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* versions from (including) 7.7 up to (excluding) 8.21.0 Added Reference Type curl: https://curl.se/docs/CVE-2026-8932.html Types: Patch, Vendor Advisory Added Reference Type curl: https://curl.se/docs/CVE-2026-8932.json Types: Vendor Advisory Added Reference Type curl: https://hackerone.com/reports/3733910 Types: Exploit, Issue Tracking, Third Party Advisory Added Reference Type CISA-ADP: https://hackerone.com/reports/3733910 Types: Exploit, Issue Tracking, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Added Reference https://hackerone.com/reports/3733910 Added SSVC {'id': 'CVE-2026-8932', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-06T16:58:28.124167Z'} -
New CVE Received by 2499f714-1537-4658-8207-48ae4bb9eae9
Jul. 03, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'curl', 'product': 'curl', 'versions': [{'status': 'affected', 'version': '8.20.0', 'versionType': 'semver', 'lessThanOrEqual': '8.20.0'}, {'status': 'affected', 'version': '8.19.0', 'versionType': 'semver', 'lessThanOrEqual': '8.19.0'}, {'status': 'affected', 'version': '8.18.0', 'versionType': 'semver', 'lessThanOrEqual': '8.18.0'}, {'status': 'affected', 'version': '8.17.0', 'versionType': 'semver', 'lessThanOrEqual': '8.17.0'}, {'status': 'affected', 'version': '8.16.0', 'versionType': 'semver', 'lessThanOrEqual': '8.16.0'}, {'status': 'affected', 'version': '8.15.0', 'versionType': 'semver', 'lessThanOrEqual': '8.15.0'}, {'status': 'affected', 'version': '8.14.1', 'versionType': 'semver', 'lessThanOrEqual': '8.14.1'}, {'status': 'affected', 'version': '8.14.0', 'versionType': 'semver', 'lessThanOrEqual': '8.14.0'}, {'status': 'affected', 'version': '8.13.0', 'versionType': 'semver', 'lessThanOrEqual': '8.13.0'}, {'status': 'affected', 'version': '8.12.1', 'versionType': 'semver', 'lessThanOrEqual': '8.12.1'}, {'status': 'affected', 'version': '8.12.0', 'versionType': 'semver', 'lessThanOrEqual': '8.12.0'}, {'status': 'affected', 'version': '8.11.1', 'versionType': 'semver', 'lessThanOrEqual': '8.11.1'}, {'status': 'affected', 'version': '8.11.0', 'versionType': 'semver', 'lessThanOrEqual': '8.11.0'}, {'status': 'affected', 'version': '8.10.1', 'versionType': 'semver', 'lessThanOrEqual': '8.10.1'}, {'status': 'affected', 'version': '8.10.0', 'versionType': 'semver', 'lessThanOrEqual': '8.10.0'}, {'status': 'affected', 'version': '8.9.1', 'versionType': 'semver', 'lessThanOrEqual': '8.9.1'}, {'status': 'affected', 'version': '8.9.0', 'versionType': 'semver', 'lessThanOrEqual': '8.9.0'}, {'status': 'affected', 'version': '8.8.0', 'versionType': 'semver', 'lessThanOrEqual': '8.8.0'}, {'status': 'affected', 'version': '8.7.1', 'versionType': 'semver', 'lessThanOrEqual': '8.7.1'}, {'status': 'affected', 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'versionType': 'semver', 'lessThanOrEqual': '7.24.0'}, {'status': 'affected', 'version': '7.23.1', 'versionType': 'semver', 'lessThanOrEqual': '7.23.1'}, {'status': 'affected', 'version': '7.23.0', 'versionType': 'semver', 'lessThanOrEqual': '7.23.0'}, {'status': 'affected', 'version': '7.22.0', 'versionType': 'semver', 'lessThanOrEqual': '7.22.0'}, {'status': 'affected', 'version': '7.21.7', 'versionType': 'semver', 'lessThanOrEqual': '7.21.7'}, {'status': 'affected', 'version': '7.21.6', 'versionType': 'semver', 'lessThanOrEqual': '7.21.6'}, {'status': 'affected', 'version': '7.21.5', 'versionType': 'semver', 'lessThanOrEqual': '7.21.5'}, {'status': 'affected', 'version': '7.21.4', 'versionType': 'semver', 'lessThanOrEqual': '7.21.4'}, {'status': 'affected', 'version': '7.21.3', 'versionType': 'semver', 'lessThanOrEqual': '7.21.3'}, {'status': 'affected', 'version': '7.21.2', 'versionType': 'semver', 'lessThanOrEqual': '7.21.2'}, {'status': 'affected', 'version': '7.21.1', 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'versionType': 'semver', 'lessThanOrEqual': '7.16.1'}, {'status': 'affected', 'version': '7.16.0', 'versionType': 'semver', 'lessThanOrEqual': '7.16.0'}, {'status': 'affected', 'version': '7.15.5', 'versionType': 'semver', 'lessThanOrEqual': '7.15.5'}, {'status': 'affected', 'version': '7.15.4', 'versionType': 'semver', 'lessThanOrEqual': '7.15.4'}, {'status': 'affected', 'version': '7.15.3', 'versionType': 'semver', 'lessThanOrEqual': '7.15.3'}, {'status': 'affected', 'version': '7.15.2', 'versionType': 'semver', 'lessThanOrEqual': '7.15.2'}, {'status': 'affected', 'version': '7.15.1', 'versionType': 'semver', 'lessThanOrEqual': '7.15.1'}, {'status': 'affected', 'version': '7.15.0', 'versionType': 'semver', 'lessThanOrEqual': '7.15.0'}, {'status': 'affected', 'version': '7.14.1', 'versionType': 'semver', 'lessThanOrEqual': '7.14.1'}, {'status': 'affected', 'version': '7.14.0', 'versionType': 'semver', 'lessThanOrEqual': '7.14.0'}, {'status': 'affected', 'version': '7.13.2', 'versionType': 'semver', 'lessThanOrEqual': '7.13.2'}, {'status': 'affected', 'version': '7.13.1', 'versionType': 'semver', 'lessThanOrEqual': '7.13.1'}, {'status': 'affected', 'version': '7.13.0', 'versionType': 'semver', 'lessThanOrEqual': '7.13.0'}, {'status': 'affected', 'version': '7.12.3', 'versionType': 'semver', 'lessThanOrEqual': '7.12.3'}, {'status': 'affected', 'version': '7.12.2', 'versionType': 'semver', 'lessThanOrEqual': '7.12.2'}, {'status': 'affected', 'version': '7.12.1', 'versionType': 'semver', 'lessThanOrEqual': '7.12.1'}, {'status': 'affected', 'version': '7.12.0', 'versionType': 'semver', 'lessThanOrEqual': '7.12.0'}, {'status': 'affected', 'version': '7.11.2', 'versionType': 'semver', 'lessThanOrEqual': '7.11.2'}, {'status': 'affected', 'version': '7.11.1', 'versionType': 'semver', 'lessThanOrEqual': '7.11.1'}, {'status': 'affected', 'version': '7.11.0', 'versionType': 'semver', 'lessThanOrEqual': '7.11.0'}, {'status': 'affected', 'version': '7.10.8', 'versionType': 'semver', 'lessThanOrEqual': '7.10.8'}, {'status': 'affected', 'version': '7.10.7', 'versionType': 'semver', 'lessThanOrEqual': '7.10.7'}, {'status': 'affected', 'version': '7.10.6', 'versionType': 'semver', 'lessThanOrEqual': '7.10.6'}, {'status': 'affected', 'version': '7.10.5', 'versionType': 'semver', 'lessThanOrEqual': '7.10.5'}, {'status': 'affected', 'version': '7.10.4', 'versionType': 'semver', 'lessThanOrEqual': '7.10.4'}, {'status': 'affected', 'version': '7.10.3', 'versionType': 'semver', 'lessThanOrEqual': '7.10.3'}, {'status': 'affected', 'version': '7.10.2', 'versionType': 'semver', 'lessThanOrEqual': '7.10.2'}, {'status': 'affected', 'version': '7.10.1', 'versionType': 'semver', 'lessThanOrEqual': '7.10.1'}, {'status': 'affected', 'version': '7.10', 'versionType': 'semver', 'lessThanOrEqual': '7.10'}, {'status': 'affected', 'version': '7.9.8', 'versionType': 'semver', 'lessThanOrEqual': '7.9.8'}, {'status': 'affected', 'version': '7.9.7', 'versionType': 'semver', 'lessThanOrEqual': '7.9.7'}, {'status': 'affected', 'version': '7.9.6', 'versionType': 'semver', 'lessThanOrEqual': '7.9.6'}, {'status': 'affected', 'version': '7.9.5', 'versionType': 'semver', 'lessThanOrEqual': '7.9.5'}, {'status': 'affected', 'version': '7.9.4', 'versionType': 'semver', 'lessThanOrEqual': '7.9.4'}, {'status': 'affected', 'version': '7.9.3', 'versionType': 'semver', 'lessThanOrEqual': '7.9.3'}, {'status': 'affected', 'version': '7.9.2', 'versionType': 'semver', 'lessThanOrEqual': '7.9.2'}, {'status': 'affected', 'version': '7.9.1', 'versionType': 'semver', 'lessThanOrEqual': '7.9.1'}, {'status': 'affected', 'version': '7.9', 'versionType': 'semver', 'lessThanOrEqual': '7.9'}, {'status': 'affected', 'version': '7.8.1', 'versionType': 'semver', 'lessThanOrEqual': '7.8.1'}, {'status': 'affected', 'version': '7.8', 'versionType': 'semver', 'lessThanOrEqual': '7.8'}, {'status': 'affected', 'version': '7.7.3', 'versionType': 'semver', 'lessThanOrEqual': '7.7.3'}, {'status': 'affected', 'version': '7.7.2', 'versionType': 'semver', 'lessThanOrEqual': '7.7.2'}, {'status': 'affected', 'version': '7.7.1', 'versionType': 'semver', 'lessThanOrEqual': '7.7.1'}, {'status': 'affected', 'version': '7.7', 'versionType': 'semver', 'lessThanOrEqual': '7.7'}], 'defaultStatus': 'unaffected'}] Added Description libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key. Added Reference https://curl.se/docs/CVE-2026-8932.html Added Reference https://curl.se/docs/CVE-2026-8932.json Added Reference https://hackerone.com/reports/3733910
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.