What’s Vulnerable › Vulnerabilities

CVE-2026-76245: stigmem Federation Peer Token Timestamp Validation Bypass

• Severity: high (CVSS 7.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-19 · updated 2026-09-11
• Weakness: CWE-345

Description

stigmem (pip package stigmem-node) version 0.9.0a1 contains a timestamp-handling mismatch in federation peer-token validation that can cause valid peer tokens to be incorrectly treated as expired. This affects the availability and reliability of authenticated federation flows on nodes using federation peer authentication paths. The issue is fixed in 0.9.0a2, which uses the canonical millisecond-based validation path.

Affected products

• eidetic-labs stigmem: before 0.9.0a2 — fixed in 0.9.0a2

How to fix

Upgrade to a fixed version: eidetic-labs stigmem 0.9.0a2. Check the vendor advisory for mitigations.

References

• https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-xh5j-xjfq-qvvx
• https://www.vulncheck.com/advisories/stigmem-federation-peer-token-timestamp-validation-bypass

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