How severe is CVE-2026-3691?

CVE-2026-3691 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-3691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3691?

CVE-2026-3691 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3691?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3691 have an EU (EUVD) identifier?

Yes. CVE-2026-3691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21623.

When was CVE-2026-3691 published?

CVE-2026-3691 was published on 2026-04-11 and last updated on 2026-06-17.

CVE-2026-3691

CVE-2026-3691 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21623
Weakness: CWE-200
Affected product: Openclaw
Published: 2026-04-11
Last modified: 2026-06-17

Description

OpenClaw Client PKCE Verifier Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose stored credentials on affected installations of OpenClaw. User interaction is required to exploit this vulnerability in that the target must initiate an OAuth authorization flow. The specific flaw exists within the implementation of OAuth authorization. The issue results from the exposure of sensitive data in the authorization URL query string. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-29381.

Frequently asked questions

What is CVE-2026-3691?: OpenClaw Client PKCE Verifier Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose stored credentials on affected installations of OpenClaw. User interaction is required to exploit this vulnerability in that the target must initiate an OAuth authorization flow. The specific flaw exists within the implementation of OAuth authorization. The issue results from the exposure of sensitive data in the authorization URL query string. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-29381.
How severe is CVE-2026-3691?: CVE-2026-3691 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-3691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3691?: CVE-2026-3691 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3691 have an EU (EUVD) identifier?: Yes. CVE-2026-3691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21623.
When was CVE-2026-3691 published?: CVE-2026-3691 was published on 2026-04-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

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