CVE-2026-76239
Published:August 19, 2026
Updated:September 24, 2026
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.
Affected Packages
https://github.com/eidetic-labs/stigmem.git (GITHUB):
Affected version(s) >=v0.9.0a1 <v0.9.0a11Fix Suggestion:
Update to version v0.9.0a11stigmem-node (PYTHON):
Affected version(s) >=0.9.0a1 <0.9.0a11Fix Suggestion:
Update to version 0.9.0a11Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
EPSS
Base Score:
0.27