CVE-2026-3690VulnerabilityPublished 30 Mar 2026

ZDI-26-228: OpenClaw Canvas Authentication Bypass Vulnerability

Source Zero Day Initiative

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Not known to be exploited.

Data as of 30 Oct 2026, 11:52 UTC

Severity

High

Rated High by Zero Day Initiative · No CVSS score from NVD or the CNA

EPSS: 0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

remote

What to do

AI-suggested

An official fix is available from OpenClaw. Users should apply the update provided in the OpenClaw security advisory at https://github.com/openclaw/openclaw/security/advisories/GHSA-vvjh-f6p9-5vcf to remediate this vulnerability. No additional mitigations are indicated by the vendor advisory.

Description

This vulnerability allows remote attackers to bypass authentication on affected installations of OpenClaw. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.4. The following CVEs are assigned: CVE-2026-3690.

Impact

Successful exploitation allows remote attackers to bypass authentication controls on affected OpenClaw installations, potentially leading to unauthorized access to sensitive information and system integrity compromise. There is no impact on availability reported. No known active exploitation has been observed.

Summary

This vulnerability in OpenClaw Canvas allows remote attackers to bypass authentication due to improper implementation of the authentication function on canvas endpoints. The flaw enables attackers to access protected functionality without credentials. The Zero Day Initiative assigned a CVSS v3.1 score of 7.4 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N), reflecting high impact on confidentiality and integrity but requiring high attack complexity. OpenClaw has released an update to fix this issue, as detailed in their security advisory.

References

zerodayinitiative.com/advisories/ZDI-26-228/ (opens in a new tab)

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