CVE-2026-76243 - stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth

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CRITICAL

stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth

Published Aug 19, 2026

9.2

CRITICAL

CVSS 4.0

EPSS 0.56%

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.

Affected products

Vendor Eidetic-Labs Product Stigmem Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <0.9.0a2
- Version
  0.9.0a2
  Status
  unaffected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Eidetic-Labs

Stigmem

unaffected

Version	Status	Constraints
0	affected	<0.9.0a2
0.9.0a2	unaffected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-285

References (2)

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

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

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner VulnCheck

Published Aug 19, 2026

Updated Aug 25, 2026

Reserved Aug 19, 2026

Link CVE-2026-76243

CISA Vulnrichment

Updated Aug 25, 2026

NVD

Status Received

Modified Aug 25, 2026

Link CVE-2026-76243

Red Hat

Severity n/a

Public date n/a

Links CVE-2026-76243