CVE-2026-50127 json
Weblate SSRF: outbound URL guard misses the NAT64 well-known prefix (64:ff9b::/96)
published 2026-06-10 4 mo ago modified 2026-10-26 14 d ago also EUVD-2026-36113 , GHSA-vmfc-9982-2m45 , PYSEC-2026-3416
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi weblate 2026.6
- weblate weblate 2026.6
- weblate openSUSE Tumbleweed 5.17.1-2.1
opensuse advisories openSUSE-SU-2026:11051-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| OSV | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | weblate | >=5.15, <2026.6 |
2026.6 |
Affected products
- WeblateOrg weblate
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/WeblateOrg/weblate/pull/19768
web
-
github.com
/WeblateOrg/weblate/security/advisories/GHSA-vmfc-9982-2m45
web
-
github.com
/WeblateOrg/weblate/releases/tag/weblate-2026.6
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-50127
advisory
-
github.com
/WeblateOrg/weblate
package
-
pypi.org
/project/weblate
package
-
github.com
/advisories/GHSA-vmfc-9982-2m45
advisory
Sources
- CVE List CVE-2026-50127
- GitHub Advisory GHSA-vmfc-9982-2m45
- NVD CVE-2026-50127
- OSV PYSEC-2026-3416
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.