Is CVE-2026-34511 in the CISA KEV catalog?

No. CVE-2026-34511 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-34511?

CVE-2026-34511 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2026-34511?

CVE-2026-34511 has an EPSS score of 0.24% (15th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34511?

Upgrade openclaw to 2026.4.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-34511

MEDIUM

5.3

CVSS v3

NVD

Description

OpenClaw before 2026.4.2 reuses the PKCE verifier as the OAuth state parameter in the Gemini OAuth flow, exposing it through the redirect URL. Attackers who capture the redirect URL can obtain both the authorization code and PKCE verifier, defeating PKCE protection and enabling token redemption.

CWE-330

How to fix

Remediation Available

openclawNVD

Affected:< 2026.4.2Fixed in:2026.4.2CVE-2026-34511derived 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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.24%probability of exploitation in 30 days

15thpercentile

Low risk: more likely to be exploited than 15% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Third-Party Advisory1

vulncheck.com

Embed a live status badge for CVE-2026-34511

Markdown

[![CVE-2026-34511](https://tridentstack.com/cve/badge/CVE-2026-34511.svg)](https://tridentstack.com/cve/CVE-2026-34511)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-34511"><img src="https://tridentstack.com/cve/badge/CVE-2026-34511.svg" alt="CVE-2026-34511"></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 2026-04-22.