OpenClaw: Browser snapshot and screenshot routes could expose internal page content after navigation

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N · score source

EPSS

• CVE-2026-42436: 0.27% estimated exploitation activity in the next 30 days; percentile 18.84 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Browser snapshot and screenshot routes could expose internal page content after navigation. Affected Packages / Versions - Package: openclaw - Ecosystem: npm - Affected versions: < 2026.4.14 - Patched versions: = 2026.4.14 Impact Authenticated browser tool callers could use snapshot, screenshot, or tab routes that did not consistently validate the final browser target after route-driven navigation. In restrictive browser SSRF configurations this could expose content from internal or otherwise disallowed pages. Technical Details The fix re-checks browser snapshot, screenshot, and tab route results against the configured browser SSRF policy before returning page content. Regression coverage was added around snapshot/screenshot and tab-route flows. Fix The issue was fixed in #66040. The first stable tag containing the fix is v2026.4.14, and openclaw@2026.4.14 includes the fix. Fix Commit(s) - b75ad800a59009fc47eaa3471410f69046150e59 - PR: #66040 Release Process Note Users should…

Published by the source

17 Apr 2026, 21:47 UTC

Last modified by the source

8 May 2026, 01:50 UTC

Source last checked

26 Oct 2026, 12:51 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-c4qm-58hj-j6pj

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-c4qm-58hj-j6pj

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# Patch Next advisory brief: CVE-2026-42436

Advisory: OpenClaw: Browser snapshot and screenshot routes could expose internal page content after navigation
IDs: CVE-2026-42436, GHSA-c4qm-58hj-j6pj
Record: https://patchnext.com/advisories/cve-2026-42436 (revision 3, source checked 26 Oct 2026, 12:51 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openclaw 2026.4.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected < 2026.4.14; fixed in 2026.4.14

## Suggested inspection (read-only)
- `npm ls openclaw --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on openclaw.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-c4qm-58hj-j6pj (OSV record GHSA-c4qm-58hj-j6pj lists affected ranges: npm openclaw >=0 <2026.4.14 (fixed))
- Verified: https://github.com/advisories/GHSA-c4qm-58hj-j6pj (GitHub-reviewed advisory GHSA-c4qm-58hj-j6pj lists affected ranges: npm openclaw >=0 <2026.4.14)

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