Vulnerability record · CVE-2026-100534 · published 26 September 2026

CVE-2026-100534: Insecure direct object reference vulnerability

OpenClaw versions before 2026.8.1 contain an authorization bypass vulnerability in webhook TaskFlow cancellation that allows attackers to cancel unrelated sessions. An attacker with a webhook route secret can supply an arbitrary child session key to cancel ACP or subagent work outside the route's configured authority.

2.3 CVSS 4.0 Low EPSS 0.27% · top 83.4% CWE-639 · Insecure direct object reference Received

2.3CVSS 4.0 base score

0.27%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

2References

26 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/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:

References

Link	Tags
https://github.com/openclaw/openclaw/security/advisories/GHSA-g24w-m94m-59qc
https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-session-cancellation-authorization-bypass

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed23 Jun 2026

Source: NIST National Vulnerability Database (record CVE-2026-100534), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.