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MEDIUM severity

GHSA-6wxc-8mgq-w26m — weblate

MEDIUMFix: WeblateOrg/weblate#19422

GHSA-6wxc-8mgq-w26m is a medium-severity (CVSS 4.6) Cross-site Scripting (XSS) vulnerability in weblate. A fix is available for weblate — see the affected versions and patch details below.

Weblate: Stored HTML injection in editor search preview

Also known asCVE-2026-45106PYSEC-2026-3415
Published
May 15, 2026
Updated
Jul 13, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Sep 26, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-6wxc-8mgq-w26m.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs19th percentile — riskier than 19% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-6wxc-8mgq-w26m by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐍weblate

Real-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

Weblate's live search preview renders unit source and context as HTML without escaping. Any contributor whose content reaches those fields stores HTML and CSS that runs inside the authenticated editor of every user who runs a matching search.

Patches

Workarounds

Only the search preview on the selected views is affected.

Resources

Weblate thanks @adrgs for reporting this issue responsibly via GitHub.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIweblateall versions2026.5pip install --upgrade 'weblate==2026.5'

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for weblate, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update weblate to 2026.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6wxc-8mgq-w26m is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact Weblate's live search preview renders unit `source` and `context` as HTML without escaping. Any contributor whose content reaches those fields stores HTML and CSS that runs inside the authenticated editor of every user who runs a matching search. ### Patches * https://github.com/WeblateOrg/weblate/pull/19422 ### Workarounds Only the search preview on the selected views is affected. ### Resources Weblate thanks @adrgs for reporting this issue responsibly via GitHub.
O3 Security · Impact-Aware SCA

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GHSA-6wxc-8mgq-w26m: weblate | O3 Security