OpenClaw Twilio voice-call webhook auth bypass when ngrok loopback compatibility is enabled

Exploitation

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

CVSS 4.0

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

EPSS

• CVE-2026-29606: 0.33% estimated exploitation activity in the next 30 days; percentile 26.63 (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 A Twilio webhook signature-verification bypass in the voice-call extension could allow unauthenticated webhook requests when a specific ngrok free-tier compatibility option is enabled. Impact This issue is limited to configurations that explicitly enable and expose the voice-call webhook endpoint. Not affected by default: - The voice-call extension is optional and disabled by default. - The bypass only applied when tunnel.allowNgrokFreeTierLoopbackBypass was explicitly enabled. - Exploitation required the webhook to be reachable (typically via a public ngrok URL during development). Worst case (when exposed and the option was enabled): - An external attacker could send forged requests to the publicly reachable webhook endpoint that would be accepted without a valid X-Twilio-Signature. - This could result in unauthorized webhook event handling (integrity) and request flooding (availability). Affected Packages / Versions - Package: openclaw (npm) - Affected versions: <=…

Published by the source

18 Feb 2026, 00:54 UTC

Last modified by the source

6 Mar 2026, 01:16 UTC

Source last checked

26 Oct 2026, 12:43 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-c37p-4qqg-3p76

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-c37p-4qqg-3p76

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# Patch Next advisory brief: CVE-2026-29606

Advisory: OpenClaw Twilio voice-call webhook auth bypass when ngrok loopback compatibility is enabled
IDs: CVE-2026-29606, GHSA-c37p-4qqg-3p76
Record: https://patchnext.com/advisories/cve-2026-29606 (revision 3, source checked 26 Oct 2026, 12:43 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openclaw 2026.2.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected < 2026.2.14; fixed in 2026.2.14

## 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-c37p-4qqg-3p76 (OSV record GHSA-c37p-4qqg-3p76 lists affected ranges: npm openclaw >=0 <2026.2.14 (fixed))
- Verified: https://github.com/advisories/GHSA-c37p-4qqg-3p76 (GitHub-reviewed advisory GHSA-c37p-4qqg-3p76 lists affected ranges: npm openclaw >=0 <2026.2.14)

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