CVE-2026-41351 OpenClaw < 2026.3.31 - Webhook Replay Detection Bypass via Base64 Signature Re-encoding
Attackers can bypass webhook replay detection by re-encoding signatures, allowing duplicate request processing in OpenClaw.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41351?
CVE-2026-41351 is a medium-severity vulnerability in Openclaw Openclaw, published on 23 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature verification.
Weakness: CWE-294
Which versions are affected by CVE-2026-41351?
2 open source packages ship an affected version, including openclaw. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
openclaw npm | All versions | 2026.3.31 |
openclaw npm | All versions | 2026.3.31 |
Products include Openclaw Openclaw.
How do I fix CVE-2026-41351?
Upgrade openclaw to 2026.3.31 or later.
Is CVE-2026-41351 being exploited?
There is no known exploitation of CVE-2026-41351 in the wild and no public exploit code.
Other vulnerabilities in Openclaw Openclaw
- CVE-2026-28363 Security feature bypass in OpenClaw
- CVE-2026-30741 Code injection in n/a
- CVE-2026-33579 OpenClaw < 2026.3.28 - Privilege Escalation via Missing Caller Scope Validation in Device Pair Approval
- CVE-2026-32922 OpenClaw < 2026.3.11 - Privilege Escalation via Unvalidated Scope in device.token.rotate
- CVE-2026-32978 OpenClaw < 2026.3.11 - Approval Bypass via Unrecognized Script Runners
Sources
Also known as GHSA-37v6-fxx8-xjmx, MINI-mp7w-6m2x-m2rj, MINI-q597-pgj3-v4rg.