CVSS 7.5 · HIGH

CVE-2026-41395

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.

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Analysis

This vulnerability affects OpenClaw's implementation of Plivo webhook verification, allowing for replay attacks that trigger duplicate voice calls. As this is a niche project for telephony integration rather than a widely used development tool or infrastructure component, it does not warrant a broad alert for the community.

Severity

Score: 7.5(HIGH)

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

AV: NETWORK

AC: LOW

PR: NONE

UI: NONE

S: UNCHANGED

C: NONE

I: HIGH

A: NONE

Weakness (CWE): CWE-325

EPSS

Probability of exploitation (next 30 days): 0.0002 (0.0%)

Percentile: 4.1%

EPSS: 2026-05-06

Affects

openclaw:openclaw

Technical description

Published: 4/28/2026, 7:37:42 PM

Last modified: 4/30/2026, 8:45:25 PM

References

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.