Advisory details:
github_osv / GHSA-c37p-4qqg-3p76
| Advisory ID | github_osv/GHSA-c37p-4qqg-3p76 |
| Aliases |
CVE-2026-29606
|
| Summary | OpenClaw Twilio voice-call webhook auth bypass when ngrok loopback compatibility is enabled ## 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: `<= 2026.2.13` (latest published as of 2026-02-14) - Patched versions: `>= 2026.2.14` (planned next release; pending publish) ## Fix `allowNgrokFreeTierLoopbackBypass` no longer bypasses signature verification. It only enables trusting forwarded headers on loopback so the public ngrok URL can be reconstructed for correct signature validation. Fix commit(s): - ff11d8793b90c52f8d84dae3fbb99307da51b5c9 Thanks @p80n-sec for reporting. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.9 |
| Risk | 3.0 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.5 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-c37p-4qqg-3p76/GHSA-c37p-4qqg-3p76.json |
| cvssv4 | 6.3 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-c37p-4qqg-3p76/GHSA-c37p-4qqg-3p76.json |
| generic_textual | MODERATE |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-09T20:38:07Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/29xxx/CVE-2026-29606.json
Source Advisory: vulnrichment/CVE-2026-29606
[{'Exploitation': 'none'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]