CVE-2026-42421 json
OpenClaw < 2026.4.8 - WebSocket Session Persistence via Shared Gateway Token Rotation
published 7mo ago modified 4mo ago also GHSA-5h3f-885m-v22w , EUVD-2026-26124
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
OpenClaw before 2026.4.8 contains a session management vulnerability where existing WebSocket sessions survive shared gateway token rotation. Attackers can maintain unauthorized access to WebSocket connections after token rotation by exploiting the failure to disconnect existing shared-token sessions.
Patch / fix
Is CVE-2026-42421 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/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 |
|---|---|---|---|
| npm | openclaw | <2026.4.8 |
2026.4.8 |
Affected products
- OpenClaw OpenClaw
Classification
- Weakness
-
- CWE-613 DEPRECATED: Insufficient Session Expiration
References
-
github.com
/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
patch
-
github.com
/openclaw/openclaw/security/advisories/GHSA-5h3f-885m-v22w
vendor-advisory, web
-
vulncheck.com
/advisories/openclaw-websocket-session-persistence-via-shared-gateway-token-rotation
third-party-advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-42421
- GitHub Advisory GHSA-5h3f-885m-v22w
- NVD CVE-2026-42421
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