CVE-2026-50127: CWE-918: Server-Side Request Forgery (SSRF) in WeblateOrg weblate
A Server-Side Request Forgery (SSRF) vulnerability exists in Weblate versions from 5.15 up to but not including 2026.6. The issue arises because the VCS_RESTRICT_PRIVATE setting did not correctly handle certain transitional IPv6 ranges, multicast addresses, and some semi-private IPv4 ranges, allowing bypass of private network restrictions. This vulnerability has been addressed in version 2026.6.
AI Analysis
Technical Summary
CVE-2026-50127 is a Server-Side Request Forgery (SSRF) vulnerability in the Weblate localization tool. Specifically, from version 5.15 to before 2026.6, the VCS_RESTRICT_PRIVATE feature failed to properly restrict some transitional IPv6 ranges, multicast addresses, and semi-private IPv4 ranges. This flaw allowed attackers to bypass private address restrictions, potentially enabling SSRF attacks. The vulnerability is fixed in Weblate version 2026.6.
Potential Impact
The vulnerability allows an attacker to bypass private network restrictions enforced by the VCS_RESTRICT_PRIVATE setting, potentially enabling SSRF attacks that could lead to unauthorized access to internal network resources. The CVSS score is 5.9 (medium severity) with high confidentiality impact but no integrity or availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Weblate to version 2026.6 or later, where this vulnerability has been patched. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the vendor has fixed the issue in version 2026.6.
CVE-2026-50127: CWE-918: Server-Side Request Forgery (SSRF) in WeblateOrg weblate
Description
A Server-Side Request Forgery (SSRF) vulnerability exists in Weblate versions from 5.15 up to but not including 2026.6. The issue arises because the VCS_RESTRICT_PRIVATE setting did not correctly handle certain transitional IPv6 ranges, multicast addresses, and some semi-private IPv4 ranges, allowing bypass of private network restrictions. This vulnerability has been addressed in version 2026.6.
CVSS v3.1
Score 5.9medium
Affected software
pkg:github/weblateorg/weblateRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-50127 is a Server-Side Request Forgery (SSRF) vulnerability in the Weblate localization tool. Specifically, from version 5.15 to before 2026.6, the VCS_RESTRICT_PRIVATE feature failed to properly restrict some transitional IPv6 ranges, multicast addresses, and semi-private IPv4 ranges. This flaw allowed attackers to bypass private address restrictions, potentially enabling SSRF attacks. The vulnerability is fixed in Weblate version 2026.6.
Potential Impact
The vulnerability allows an attacker to bypass private network restrictions enforced by the VCS_RESTRICT_PRIVATE setting, potentially enabling SSRF attacks that could lead to unauthorized access to internal network resources. The CVSS score is 5.9 (medium severity) with high confidentiality impact but no integrity or availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade Weblate to version 2026.6 or later, where this vulnerability has been patched. No other official remediation or temporary fixes are documented. Patch status is not explicitly stated but the vendor has fixed the issue in version 2026.6.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-03T18:49:32.275Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a29c2720e53e738838993be
Added to database: 06/10/2026, 20:00:50 UTC
Last enriched: 07/08/2026, 13:38:55 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 70
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