CVE-2026-39845

Weblate: SSRF via the webhook add-on using unprotected fetch_url()

MEDIUM
4.1
CVSS Score
Published: April 15, 2026 at 06:26 PM UTC
Updated: June 17, 2026 at 10:42 AM UTC
2 products affected across 2 vendorsWeblateWeblate

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Severity
MEDIUM4.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Weblate is a web based localization tool. In versions prior to 5.17, the webhook add-on did not utilize existing SSRF protections. This issue has been fixed in version 5.17. If developers are unable to update immediately, they can disable the webhook add-on as a workaround.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.17
v < 5.17
Affected range stops below 5.17, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMThird Party Advisory
Source: cverecord
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-f8hv-g549-hwg2
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/WeblateOrg/weblate/pull/18815

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.1MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-918

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