GHSA-q9cm-88jx-3vfw is a high-severity (CVSS 8.8) Incorrect Default Permissions vulnerability in org.jenkins-ci.plugins:oic-auth. O3 Security confirms whether GHSA-q9cm-88jx-3vfw is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Improper handling of case sensitivity in Jenkins OpenId Connect Authentication Plugin
Real-World Exposure
org.jenkins-ci.plugins:oic-authReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
The Jenkins OpenId Connect Authentication Plugin 4.452.v2849b_d3945fa_ and earlier treats usernames as case-insensitive.
On a Jenkins instance configured with a case-sensitive OpenID Connect provider, this allows attackers to log in as any user by providing a username that differs only in letter case, potentially gaining administrator access to Jenkins.
OpenId Connect Authentication Plugin 4.453.v4d7765c854f4 introduces an advanced configuration option to manage username case sensitivity, with default to case-sensitive.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jenkins-ci.plugins:oic-auth | all versions | 4.453.v4d7765c854f4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:oic-auth. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.jenkins-ci.plugins:oic-auth to 4.453.v4d7765c854f4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q9cm-88jx-3vfw is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-q9cm-88jx-3vfw is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-q9cm-88jx-3vfw. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-q9cm-88jx-3vfw in your dependencies?
O3 detects GHSA-q9cm-88jx-3vfw across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.