Vulnerability Description
Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal loopback and private network destinations. Attackers can trigger matching fact-change events to cause the Stigmem server to issue server-side HTTP POST requests to internal services, enabling blind SSRF attacks against localhost and private network endpoints.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
- https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-we
- https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
FAQ
What is CVE-2026-76239?
CVE-2026-76239 is a vulnerability with a CVSS score of 6.3 (MEDIUM). Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal loopback and private network destinations...
How severe is CVE-2026-76239?
CVE-2026-76239 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76239?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.