CVE-2026-41395

Name: CVE-2026-41395
Creator: NVD / NIST
Published: 2026-04-28T19:37:42.88+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.15%

Last modified Jun 17, 2026

CVE-2026-41395 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS 4.0

8.2/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.15%

4.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-325

Affected Software

Vendor	Product	Versions
Openclaw	Openclaw	< 2026.3.28

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-8689-gm9g-jgr6Vendor Advisory
https://www.vulncheck.com/advisories/openclaw-webhook-replay-via-query-parameter-reordering-in-plivo-v3Third Party Advisory

Timeline

Published: Apr 28, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41395?

How severe is CVE-2026-41395?

CVE-2026-41395 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41395?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41395?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST