CVE-2026-76242: Eidetic-Labs Stigmem

Critical severity, CVSS 9.1. EPSS: 0.3% chance of exploitation in the next 30 days.

stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can register a malicious peer and gain access to or tamper with federation traffic. Fixed in 0.9.0a2, which introduces a pending approval flow requiring administrator fingerprint verification before peer tokens are accepted.

Affected products

• Eidetic-Labs Stigmem: before 0.9.0a2 (fixed in 0.9.0a2)

Published 2026-08-19. Last modified 2026-09-11.