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CVE-2026-50127

CVE-2026-50127 · Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Weblate is a web based localization tool. From version 5.15 to before version 2026.6, Weblate's VCS_RESTRICT_PRIVATE did not properly account for some transitional IPv6 ranges, multicast addresses, or some semi-private IPv4 ranges, which allowed some addresses to bypass private range restrictions. This issue has been patched in version 2026.6.

CVSS 5.9 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • weblate

    Versions
    • >= 5.15, < 2026.6: Affected

    No fix published

  • weblate PyPI

    Versions
    • 2026.5
    • 5.15
    • 5.15.1
    • 5.15.2
    • 5.16
    • 5.16.1
    • 5.16.2
    • 5.17
    • 5.17.1
    Affected ranges
    • ECOSYSTEM: ≥ 5.15, < 2026.6

    Update to 2026.6

Original sources

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