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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
WeblateOrg weblate affected
Version Status Constraints
>= 5.15, < 2026.6 affected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/WeblateOrg/weblate/pull/19768 cve-icon cve-icon
https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.6 cve-icon cve-icon
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-vmfc-9982-2m45 cve-icon cve-icon
History

Wed, 10 Jun 2026 20:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-10T19:56:37.829Z

Reserved: 2026-06-03T18:49:32.275Z

Link: CVE-2026-50127

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-06-10T20:17:29.427

Modified: 2026-06-10T20:21:20.207

Link: CVE-2026-50127

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T21:30:36Z

Weaknesses