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Home/Vulnerability/CVE-2026-50127

CVE-2026-50127

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

Published: Jun 10, 2026Updated: Jun 10, 2026 Sources: CVE List
NVD MITRE
5.9CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-918CWE-918: Server-Side Request Forgery (SSRF)

Affected Products

weblate
WeblateOrg

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/WeblateOrg/weblate/security/advisories/GHSA-vmfc-9982-2m45
github.com
https://github.com/WeblateOrg/weblate/pull/19768
github.com
https://github.com/WeblateOrg/weblate/releases/tag/weblate-2026.6
github.com

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