CVE-2026-76245 json
stigmem Federation Peer Token Timestamp Validation Bypass
published 2026-05-29 5 mo ago modified 2026-09-11 58 d ago also GHSA-xh5j-xjfq-qvvx , EUVD-2026-62409
- cvss
- 7.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
stigmem (pip package stigmem-node) version 0.9.0a1 contains a timestamp-handling mismatch in federation peer-token validation that can cause valid peer tokens to be incorrectly treated as expired. This affects the availability and reliability of authenticated federation flows on nodes using federation peer authentication paths. The issue is fixed in 0.9.0a2, which uses the canonical millisecond-based validation path.
Patch / fix
- pypi stigmem-node 0.9.0a2
- eidetic-labs stigmem 0.9.0a2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
References
-
github.com
/eidetic-labs/stigmem/security/advisories/GHSA-xh5j-xjfq-qvvx
vendor-advisory, web
-
vulncheck.com
/advisories/stigmem-federation-peer-token-timestamp-validation-bypass
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-2026-76245
- GitHub Advisory GHSA-xh5j-xjfq-qvvx
- NVD CVE-2026-76245
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