CVE-2026-76243 json
stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth
published 2026-05-29 5 mo ago modified 2026-09-24 45 d ago also GHSA-fp6w-8wpg-74g5 , EUVD-2026-62407
- cvss
- 9.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi stigmem-node 0.9.0a2
- eidetic-labs stigmem 0.9.0a2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | 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 |
| CNA | 4.0 | 9.2 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | stigmem-node | <0.9.0a2 |
0.9.0a2 |
Affected products
- eidetic-labs stigmem
Classification
References
-
github.com
/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5
vendor-advisory, web
-
vulncheck.com
/advisories/stigmem-before-0a2-authentication-bypass-via-disabled-auth
third-party-advisory
-
github.com
/eidetic-labs/stigmem
package
-
github.com
/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35
web
-
github.com
/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md
web
-
github.com
/eidetic-labs/stigmem/releases/tag/v0.9.0a2
web
Sources
- CVE List CVE-2026-76243
- GitHub Advisory GHSA-fp6w-8wpg-74g5
- NVD CVE-2026-76243
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