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VulnerabilityPublished Updated

CVE-2026-40037: OpenClaw · Open Redirect

Affects OpenClawSource CVE Database V5

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Not known to be exploited · CVSS 7.1 High : upgrade to 2026.4.8 soon.

Data as of 29 Oct 2026, 21:45 UTC

CVSS 4.0 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.07.1
CNA (VulnCheck)CVSS 3.16.5
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers can reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-04-09.

Patch
Available – fixed in 2026.4.8
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 29 Oct 2026.

What to do

Upgrade OpenClaw to 2026.4.8.

Affected software

ProductAffectedFixed in
OpenClawOpenClawAffected
  • <2026.4.8
Fixed in
  • 2026.4.8
npmOpenClawpkg:npm/OpenClawOther threatsAffected
  • <2026.4.8
Fixed in
  • 2026.4.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade OpenClaw to version 2026.4.8 or later, where this vulnerability has been fixed. No other mitigation steps are indicated by the vendor advisory.

Description

OpenClaw before 2026.4.8 contains a request body replay vulnerability in fetchWithSsrFGuard that allows unsafe request bodies to be resent across cross-origin redirects. Attackers can exploit this by triggering redirects to exfiltrate sensitive request data or headers to unintended origins.

References

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