Cyber Resilience

CVE-2026-41356

Openclaw ≤ 2026.3.31

Public PoC
Published
23 April 2026
Modified
29 April 2026
Patch / advisory
View advisory
CVSS Score v4 2.3
Click a component to see what it means
Raw vectorCVSS: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
EPSS Score 0.0019 9th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2026-41356 is a low-severity Insufficient Session Expiration (CWE-613) vulnerability in Openclaw Openclaw. Its CVSS base score is 2.3 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Valid Accounts (T1078); ranked at the 9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to AC-12 (Session Termination) and AC-3 (Access Enforcement) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

OpenClaw before 2026.3.31 fails to terminate active WebSocket sessions when rotating device tokens. Attackers with previously compromised credentials can maintain unauthorized access through existing WebSocket connections after token rotation.

CWE(s)
CWE-613

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
Why these techniques?

Insufficient session expiration (CWE-613) on WebSocket connections allows continued use of compromised valid credentials/tokens after rotation, directly enabling persistence via T1078 Valid Accounts.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-34503Same product: Openclaw Openclaw
CVE-2026-53843Same product: Openclaw Openclaw
CVE-2026-41348Same product: Openclaw Openclaw
CVE-2026-45005Same product: Openclaw Openclaw
CVE-2026-41916Same product: Openclaw Openclaw
CVE-2026-42421Same product: Openclaw Openclaw
CVE-2026-41340Same product: Openclaw Openclaw
CVE-2026-53824Same product: Openclaw Openclaw
CVE-2026-53830Same product: Openclaw Openclaw
CVE-2026-43585Same product: Openclaw Openclaw

Affected Assets

openclaw
openclaw
≤ 2026.3.31

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-12 Session Termination
  • AC-3 Access Enforcement
  • SC-23 Session Authenticity
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

AC-12 Session Termination good match
prevent

Directly requires termination of active sessions (including WebSocket) upon credential or token changes to prevent continued use of stale authorizations.

AC-3 Access Enforcement partial match
prevent

Enforces that every access decision (WebSocket message) must be evaluated against the current valid token, blocking use of rotated/revoked credentials.

SC-23 Session Authenticity partial match
prevent

Ensures session authenticity is re-validated continuously so that a WebSocket connection cannot persist after its underlying device token has been rotated.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 mostly match
prevents

Credential lifecycle management directly includes enforcing session expiration to prevent reuse.

PR.AA-05 mostly match
prevents

Authorization policy enforcement and review covers terminating stale sessions to limit access scope.

PR.AA-03 partial match
prevents

Authentication mechanisms can incorporate session timeout checks but do not inherently address expiration policy.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.5 Secure authentication none match
none

Automatic termination of inactive sessions and limits on connection duration shrink the window during which a hijacked or unattended authenticated session can be exploited.

References