7.2
HIGH
CVSS 4.0
CVE-2026-17593
Nexus Repository - Arbitrary Class Instantiation via Unsafe Realm Configuration
Overview
Description
An account holding the nexus:settings:update permission in Nexus Repository 3 (or the equivalent nexus:settings permission in the legacy Nexus Repository 2) could submit arbitrary values as realm identifiers through an internal configuration API that did not validate them against the set of registered realms. Because unrecognized entries were persisted and re-evaluated on every realm load via a legacy code path, this could result in unintended code executing inside the Nexus Repository process, and in some cases a persistent authentication lockout that was not visible through the administrative UI.
Details
INFO
Published Date :
Aug. 7, 2026, 5:16 p.m.
Last Modified :
Aug. 7, 2026, 7:17 p.m.
Remotely Exploit :
Yes !
Source :
103e4ec9-0a87-450b-af77-479448ddef11
Impact
Affected Products
The following products are affected by CVE-2026-17593
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.
No affected product recoded yet
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 4.0 | HIGH | 103e4ec9-0a87-450b-af77-479448ddef11 | ||||
| CVSS 4.0 | HIGH | 103e4ec9-0a87-450b-af77-479448ddef11 |
Solution
Update Nexus Repository to fix realm identifier validation and prevent code execution and lockouts.
- Update Nexus Repository to the latest version.
- Review and reset realm configurations if necessary.
- Ensure proper permission controls are applied.
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-2026-17593.
| URL | Resource |
|---|---|
| https://help.sonatype.com/en/sonatype-nexus-repository-3-95-0-release-notes.html | |
| https://support.sonatype.com/hc/en-us/articles/53849535836179/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-17593 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-2026-17593
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-17593 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-17593 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 Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 07, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-17593', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-07T18:06:53.070421Z'} -
New CVE Received by 103e4ec9-0a87-450b-af77-479448ddef11
Aug. 07, 2026
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'cpe:2.3:a:sonatype:nexus_repository_manager:3.87.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.87.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.87.2:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.88.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.88.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.89.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.89.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.90.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.90.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.90.2:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.90.3:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.90.4:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.91.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.91.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.92.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.92.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.92.2:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.92.3:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.93.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.93.1:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.93.2:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.94.0:*:*:*:*:*:*:*', 'cpe:2.3:a:sonatype:nexus_repository_manager:3.94.1:*:*:*:*:*:*:*'], 'vendor': 'Sonatype', 'product': 'Nexus Repository', 'versions': [{'status': 'affected', 'version': '2.8.0', 'lessThan': '3.95.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description An account holding the nexus:settings:update permission in Nexus Repository 3 (or the equivalent nexus:settings permission in the legacy Nexus Repository 2) could submit arbitrary values as realm identifiers through an internal configuration API that did not validate them against the set of registered realms. Because unrecognized entries were persisted and re-evaluated on every realm load via a legacy code path, this could result in unintended code executing inside the Nexus Repository process, and in some cases a persistent authentication lockout that was not visible through the administrative UI. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-470 Added Reference https://help.sonatype.com/en/sonatype-nexus-repository-3-95-0-release-notes.html Added Reference https://support.sonatype.com/hc/en-us/articles/53849535836179/
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.