CVE-2026-43534
OpenClaw < 2026.4.10 - Unsanitized External Input in Agent Hook Events
OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
OpenClaw < 2026.4.10 - Unsanitized External Input in Agent Hook Events
OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
- Record
CVE-2026-43534- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-345
- Updated
- 2026-11-02
EUVDEUVD-2026-27279
OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
- Record
EUVD-2026-27279- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7g8c-cfr3-vqqr
OpenClaw: Agent hook events could enqueue trusted system events from unsanitized external input
Summary
Agent hook events could enqueue trusted system events from unsanitized external input.
Affected Packages / Versions
- Package:
openclaw - Ecosystem: npm
- Affected versions:
< 2026.4.10 - Patched versions:
>= 2026.4.10
Impact
Agent hook dispatch could turn externally supplied hook metadata into trusted system events, allowing untrusted input to enter the agent as higher-trust context.
Technical Details
The fix sanitizes hook names and marks agent hook system events as untrusted before enqueueing them.
Fix
The issue was fixed in #64372. The first stable tag containing the fix is v2026.4.10, and [email protected] includes the fix.
Fix Commit(s)
e3a845bde5b54f4f1e742d0a51ba9860f9619b29- PR: #64372
Release Process Note
Users should upgrade to openclaw 2026.4.10 or newer. The latest npm release, 2026.4.14, already includes the fix.
Credits
Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.
- Record
GHSA-7g8c-cfr3-vqqr- CVSS 4.0
- 6.6 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-269, CWE-345
- Updated
- 2026-11-02
NVD
OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
- Record
CVE-2026-43534- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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 - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-345
- Updated
- 2026-11-02
OSV
OpenClaw < 2026.4.10 - Unsanitized External Input in Agent Hook Events
OpenClaw before 2026.4.10 contains an input validation vulnerability that allows external hook metadata to be enqueued as trusted system events. Attackers can supply malicious hook names to escalate untrusted input into higher-trust agent context.
- Record
CVE-2026-43534- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N - Weakness
- CWE-345
- Updated
- 2026-11-02
OSVGHSA-7g8c-cfr3-vqqr
OpenClaw: Agent hook events could enqueue trusted system events from unsanitized external input
Summary
Agent hook events could enqueue trusted system events from unsanitized external input.
Affected Packages / Versions
- Package:
openclaw - Ecosystem: npm
- Affected versions:
< 2026.4.10 - Patched versions:
>= 2026.4.10
Impact
Agent hook dispatch could turn externally supplied hook metadata into trusted system events, allowing untrusted input to enter the agent as higher-trust context.
Technical Details
The fix sanitizes hook names and marks agent hook system events as untrusted before enqueueing them.
Fix
The issue was fixed in #64372. The first stable tag containing the fix is v2026.4.10, and [email protected] includes the fix.
Fix Commit(s)
e3a845bde5b54f4f1e742d0a51ba9860f9619b29- PR: #64372
Release Process Note
Users should upgrade to openclaw 2026.4.10 or newer. The latest npm release, 2026.4.14, already includes the fix.
Credits
Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.
- Record
GHSA-7g8c-cfr3-vqqr- CVSS 4.0
- 6.6 Medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-269, CWE-345
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openclawnpm |
before 2026.4.10 | 2026.4.10 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-43534 is a critical vulnerability (CVSS 9.3) in Openclaw, published April 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. Fixed in openclaw 2026.4.10.
References
github.com/openclaw/openclaw/security/advisories/GHSA-7g8c-cfr3-vqqr
vulncheck.com/advisories/openclaw-unsanitized-external-input-in-agent-hook-events
nvd.nist.gov/vuln/detail/CVE-2026-43534