CVE-2026-76245 eidetic-labs CVE debrief

Who should care

Defenders and administrators using stigmem-node version 0.9.0a1 in their environments, especially those relying on federation peer authentication, should assess exposure and prioritize upgrading to version 0.9.0a2.

Why it matters

CVE-2026-76245 affects stigmem-node version 0.9.0a1, causing valid peer tokens to be treated as expired. Defenders should prioritize verification, upgrading, and assessing exposure in their environments.

• Potential disruption to authenticated federation flows due to incorrect token expiration
• Reliability issues for nodes using federation peer authentication paths
• Verification priority for environments using stigmem-node version 0.9.0a1

Technical summary

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

Defensive priority

Defenders should prioritize verifying and upgrading to version 0.9.0a2 if using 0.9.0a1, and assess exposure in their environments.

Recommended defensive actions

• Verify and upgrade stigmem-node to version 0.9.0a2 if using 0.9.0a1
• Assess exposure in environments using federation peer authentication paths
• Monitor for potential issues with authenticated federation flows
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source references provide details on the vulnerability and its fix. Additional information on potential exploitation or affected systems is limited. Defenders should verify and upgrade to version 0.9.0a2, assess exposure in their environments, and monitor for potential issues with authenticated federation flows. The timestamp-handling mismatch in federation peer-token validation causes valid peer tokens to be incorrectly treated as expired, affecting the availability and reliability of authenticated federation flows

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.