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OpenClaw before 2026.8.1 Session Cancellation Authorization Bypass

Type: advisorySources: OSV

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.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-100534
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 21:03 UTC · Revision 1

Source evidence

OpenClaw before 2026.8.1 Session Cancellation Authorization Bypass

core-osv · Original source

Published 26 Sept 2026, 02:18 UTC

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.

osv:CVE-2026-100534
Complete source record
{
  "id": "ae2b7349ad77ba3baf0f3ac862876a55b26d4dc75ea5d48b2606b67e500aec96",
  "url": "https://osv.dev/vulnerability/CVE-2026-100534",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenClaw before 2026.8.1 Session Cancellation Authorization Bypass",
    "summary": "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.",
    "evidence": "osv:CVE-2026-100534",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-100534",
      "aliases": [
        "CVE-2026-100534",
        "GHSA-g24w-m94m-59qc"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openclaw/openclaw",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "ea806575e6450e4d1efdfc72c19f04be982a1b9b"
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              "database_specific": {
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                  {
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                        "introduced": "0"
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                        "fixed": "2026.8.1"
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                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
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                  {
                    "range": [
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                        "introduced": "0"
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                        "fixed": "2026.8.1"
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                    "source": "DESCRIPTION"
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      "modified": "2026-10-28T02:30:23.738253586Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100534.json",
        "https://github.com/openclaw/openclaw/security/advisories/GHSA-g24w-m94m-59qc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100534",
        "https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-session-cancellation-authorization-bypass"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
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        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100534.json"
      }
    },
    "related_cves": [
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        "value": "CVE-2026-100534",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490047,
  "published_at": "2026-09-26T02:18:34.477+00:00"
}