Is CVE-2026-35646 in the CISA KEV catalog?

No. CVE-2026-35646 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-35646?

CVE-2026-35646 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2026-35646?

CVE-2026-35646 has an EPSS score of 0.24% (16th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-35646?

Upgrade openclaw to 2026.3.25 or later.

CVE & CISA-KEV Catalog

CVE-2026-35646

MEDIUM

4.8

CVSS v3

NVD

Description

OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers to brute-force weak webhook secrets. The vulnerability exists because invalid webhook tokens are rejected without throttling repeated authentication attempts, enabling attackers to guess weak tokens through rapid successive requests.

CWE-307

How to fix

Remediation Available

openclawNVD

Affected:< 2026.3.25Fixed in:2026.3.25CVE-2026-35646derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.24%probability of exploitation in 30 days

16thpercentile

Low risk: more likely to be exploited than 16% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Third-Party Advisory1

vulncheck.com

Embed a live status badge for CVE-2026-35646

Markdown

[![CVE-2026-35646](https://tridentstack.com/cve/badge/CVE-2026-35646.svg)](https://tridentstack.com/cve/CVE-2026-35646)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-35646"><img src="https://tridentstack.com/cve/badge/CVE-2026-35646.svg" alt="CVE-2026-35646"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-15.