CVE-2026-76243

Critical

Description

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.

SeverityCritical

CVSS9.2

Exploit probability—

ProductStigmem-node

PublishedAug 19, 2026

First seenAug 19, 2026

Weakness typeCWE-285CWE-285

How to fix

Update

stigmem-node0.9.0a2 or later

Vendor advisories

github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5

Affected products

Product	Affected versions	Fixed in
stigmem-nodePyPI	v < 0.9.0a2	0.9.0a2

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