GHSA-j7pg-863g-22p6
MEDIUMGHSA-j7pg-863g-22p6 is a medium-severity (CVSS 5.3) Information Exposure vulnerability in org.jenkins-ci.plugins:mercurial. O3 Security confirms whether GHSA-j7pg-863g-22p6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Webhook endpoint discloses job names to unauthorized users in Jenkins Mercurial Plugin
Blast Radius
org.jenkins-ci.plugins:mercurialReal-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
Mercurial Plugin provides a webhook endpoint at /mercurial/notifyCommit that can be used to notify Jenkins of changes to an SCM repository. This endpoint receives a repository URL, and Jenkins will schedule polling for all jobs configured with the specified repository. It can be accessed with GET requests and without authentication.
In Mercurial Plugin 1251.va_b_121f184902 and earlier, the output of the webhook endpoint will provide information about which jobs were triggered or scheduled for polling, including jobs the user has no permission to access. This allows attackers with knowledge of Mercurial repository URLs to obtain information about the existence of jobs configured with this Mercurial repository.
Mercurial Plugin 1260.vdfb_723cdcc81 does not provide the names of jobs for which polling is triggered unless the user has the appropriate Item/Read permission.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jenkins-ci.plugins:mercurial | all versions | 1260.vdfb_723cdcc81 |
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:mercurial. 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:mercurial to 1260.vdfb_723cdcc81 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j7pg-863g-22p6 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-j7pg-863g-22p6 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-j7pg-863g-22p6. 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-j7pg-863g-22p6 in your dependencies?
O3 detects GHSA-j7pg-863g-22p6 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.