What is GHSA-xq22-gq5h-mvx5?

GHSA-xq22-gq5h-mvx5 is a security advisory published by GitHub Security Advisories with Medium severity. Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook...

Which CVE IDs does GHSA-xq22-gq5h-mvx5 cover?

GHSA-xq22-gq5h-mvx5 covers the following CVE IDs: CVE-2026-76239. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-xq22-gq5h-mvx5?

GHSA-xq22-gq5h-mvx5 has a CVSS v3 base score of 6.3, published by GitHub Security Advisories.

GHSA-xq22-gq5h-mvx5MediumCVSS 6.3

Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook...

Vendor

GitHub Security Advisories

Published

August 19, 2026

Last Modified

August 19, 2026

🔗 CVE IDs covered (1)

CVE-2026-76239 →

📋 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.

🔗 References (4)

https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
https://nvd.nist.gov/vuln/detail/CVE-2026-76239
https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-webhook-delivery-address
https://github.com/advisories/GHSA-xq22-gq5h-mvx5