CVE-2026-76244: stigmem-node Insecure Federation Transport Configuration

Severity: critical (CVSS 9.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% 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-319

Description

stigmem-node contains an insecure default configuration vulnerability that allows federation traffic to traverse networks without mTLS protection when non-loopback endpoints are enabled. Operators who explicitly disabled mTLS while binding federation to non-loopback addresses expose federation traffic to cleartext interception and man-in-the-middle attacks.

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-jmfc-hfjq-pxcp
https://www.vulncheck.com/advisories/stigmem-node-insecure-federation-transport-configuration

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