Vulnerability · Published Aug 19, 2026 · Assigned by VulnCheck

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

High 7.1

In plain English

A high-severity insufficient verification of data authenticity in stigmem from eidetic-labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.2%top 85.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	stigmem-node	0.9.0a2	GHSA-xh5j-xjfq-qvvx

Affected products (as reported)

Vendor	Product	Versions
eidetic-labs	stigmem	0 – before 0.9.0a2

Weakness: CWE-345 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-xh5j-xjfq-qvvx) vendor-advisory
VulnCheck Advisory: stigmem Federation Peer Token Timestamp Validation Bypass third-party-advisory