Is CVE-2026-34505 in the CISA KEV catalog?

No. CVE-2026-34505 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-34505?

CVE-2026-34505 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-34505?

CVE-2026-34505 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34505?

Upgrade openclaw to 2026.3.12 or later.

CVE & CISA-KEV Catalog

CVE-2026-34505

MEDIUM

6.5

CVSS v3

NVD

Description

OpenClaw before 2026.3.12 applies rate limiting only after successful webhook authentication, allowing attackers to bypass rate limits and brute-force webhook secrets. Attackers can submit repeated authentication requests with invalid secrets without triggering rate limit responses, enabling systematic secret guessing and subsequent forged webhook submission.

CWE-307

How to fix

Remediation Available

openclawNVD

Affected:< 2026.3.12Fixed in:2026.3.12CVE-2026-34505derived 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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Vendor Advisory1

github.com

Third-Party Advisory1

vulncheck.com

Related Vulnerabilities

Other CWE-307 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-17240	Critical	9.8	40%	-	-
CVE-2023-29301	High	7.5	29%	-	-
CVE-2023-22960	High	7.5	28%	-	Fix
CVE-2020-15906	Critical	9.8	27%	-	Fix
CVE-2016-9361	Critical	9.8	20%	-	-
CVE-2024-39225	Critical	9.8	15%	-	-

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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 2026-04-02.