GHSA-5cmv-3rc4-7279 is a medium-severity (CVSS 4.3) vulnerability in weblate. O3 Security confirms whether GHSA-5cmv-3rc4-7279 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Weblate vulnerable to XSS via crafted Markdown
Real-World Exposure
weblateReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
Impact
The Markdown renderer used in user comments and other user-provided content didn't properly sanitize some attributes.
Patches
Workarounds
Even though the attacker might be able to inject code into the HTML, the Weblate's strict CSP should mitigate the risks.
Acknowlegement
Michal Čihař has identified and fixed this vulnerability.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | weblate | all versions | 5.17.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for weblate. 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 weblate to 5.17.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5cmv-3rc4-7279 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-5cmv-3rc4-7279 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-5cmv-3rc4-7279. 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-5cmv-3rc4-7279 in your dependencies?
O3 detects GHSA-5cmv-3rc4-7279 across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.