CVE-2026-76243

9.2 criticalEPSS 0.6%

Critical (9.2). EPSS 0.6% chance of exploitation in the next 30 days. Fixed in stigmem-node 0.9.0a2.

stigmem versions before 0.9.0a2 allow unauthenticated access when authentication is disabled on non-loopback deployments. Attackers can perform read, write, and federation operations with anonymous identity when nodes are exposed outside local development environments.

Severity

CVSS 4.0

9.2 critical

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWE: CWE-285
Published: 2026-08-19
Modified: 2026-09-24
Record from: the NVD, synced 2026-10-19

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-fp6w-8wpg-74g5	PyPI	stigmem-node	<0.9.0a2	0.9.0a2

References

https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5
https://www.vulncheck.com/advisories/stigmem-before-0a2-authentication-bypass-via-disabled-auth

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