CVE-2026-41395

OpenClaw < 2026.3.28 - Webhook Replay via Query Parameter Reordering in Plivo V3

State: Published
Severity: 8.2 High
Published: Apr 28, 2026
Updated: Apr 29, 2026
Reserved: Apr 20, 2026

Description

OpenClaw before 2026.3.28 contains a webhook replay vulnerability in Plivo V3 signature verification that canonicalizes query ordering for signatures but hashes raw URLs for replay detection. Attackers can reorder query parameters to bypass replay cache detection and trigger duplicate voice-call processing with a captured valid signed webhook.

Scores

CVSS	Score	Vector	Source
4.0	8.2 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	VulnCheck

Weaknesses

CWE-325 Missing Cryptographic Step

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.3.28Affected 2026.3.28Not affected

References

GitHub Security Advisory (GHSA-8689-gm9g-jgr6)vendor-advisory
VulnCheck Advisory: OpenClaw < 2026.3.28 - Webhook Replay via Query Parameter Reordering in Plivo V3third-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.