CVE-2026-35665 — MEDIUM (5.3)

Q: How severe is CVE-2026-35665?

CVE-2026-35665 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-35665?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.

Vulnerability Description

OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Openclaw	Openclaw	< 2026.3.24

Related Weaknesses (CWE)

CWE-405

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-w6m8-cqvj-pg5vExploitVendor Advisory
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-feishu-webhoThird Party Advisory

FAQ

What is CVE-2026-35665?

CVE-2026-35665 is a vulnerability with a CVSS score of 5.3 (MEDIUM). OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature ver...

How severe is CVE-2026-35665?

CVE-2026-35665 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-35665?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.