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 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 v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236
https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-webhook-delivery-address
https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-19 14:17

Updated : 2026-08-21 12:16

NVD link : CVE-2026-76239

Mitre link : CVE-2026-76239

CVE.ORG link : CVE-2026-76239

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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