MEDIUM 5.3 NVD
CVE-2026-76239
Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal l
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
- https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
- https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-webhook-deli
- https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-08-19 via NVD.
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