{"id":"CVE-2026-44997","aliases":["EUVD-2026-29142","GHSA-q3jj-46pq-826r","GHSA-w626-296m-8f85"],"status":"published","title":"OpenClaw \u003c 2026.4.22 - Security Envelope Constraint Bypass in ACP Child Sessions","description":"OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","severity":{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00222,"percentile":0.1283,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-266","CWE-277"],"published":"2026-05-04T20:21:49Z","modified":"2026-10-28T02:30:27Z","fixes":[{"ecosystem":"npm","package":"openclaw","fixed_in":["2026.4.22"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"openclaw","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2026.4.21"},{"fixed":"2026.4.22"}]}]},{"source":"osv","ecosystem":"npm","package":"openclaw","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.4.22"}]}]}],"products":[{"vendor":"openclaw","product":"openclaw"}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-q3jj-46pq-826r","tags":["vendor-advisory","Patch","Third Party Advisory","advisory","web"]},{"url":"https://github.com/openclaw/openclaw/commit/31160dc069b7cc5d833b39c53736a41ad3befda2","tags":["patch","Patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/openclaw-security-envelope-constraint-bypass-in-acp-child-sessions","tags":["third-party-advisory","Patch","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44997","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q3jj-46pq-826r"},{"url":"https://github.com/advisories/GHSA-w626-296m-8f85"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44997.json","tags":["advisory"]},{"url":"https://github.com/openclaw/openclaw","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-44997","title":"OpenClaw \u003c 2026.4.22 - Security Envelope Constraint Bypass in ACP Child Sessions","description":"OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"published","published":"2026-05-11T16:46:36.591Z","modified":"2026-05-11T17:25:42.338Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-266"],"updated_at":"2026-11-02T13:42:49.132798Z"}],"euvd":[{"id":"EUVD-2026-29142","description":"OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"published","published":"2026-05-11T16:46:36Z","modified":"2026-05-11T17:25:42Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T19:05:10.736891Z"}],"ghsa":[{"id":"GHSA-q3jj-46pq-826r","title":"OpenClaw's ACP child sessions inherit subagent security envelope constraints","description":"## Summary\nACP child sessions inherit subagent security envelope constraints.\n\n## Affected Packages / Versions\n- Package: openclaw (npm)\n- Affected versions: \u003c= 2026.4.21\n- Fixed version: 2026.4.22\n\n## Impact\nA restricted subagent spawning an ACP child session could fail to carry forward subagent-only constraints such as depth, child-count limits, control scope, or target-agent restrictions.\n\n## Fix\nACP spawn now resolves and persists child subagent envelope fields, enforces maximum depth and active-child caps, and applies the inherited control scope to child ACP sessions.\n\n## Fix Commit(s)\n- 31160dc069b7cc5d833b39c53736a41ad3befda2\n\n## Verification\n- The fix commit is contained in the public v2026.4.22 tag.\n- openclaw@2026.4.22 is published on npm and the compiled package contains the fix.\n- Focused regression coverage for this path passed before publication.\n\nOpenClaw thanks @zsxsoft, @qclawer, and @KeenSecurityLab for reporting.","status":"published","published":"2026-05-04T20:21:49Z","modified":"2026-05-29T03:48:04Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-277"],"updated_at":"2026-11-02T14:40:14.666177Z"},{"id":"GHSA-w626-296m-8f85","title":"Duplicate Advisory: OpenClaw's ACP child sessions inherit subagent security envelope constraints","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-q3jj-46pq-826r. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"withdrawn","published":"2026-05-11T18:31:46Z","modified":"2026-05-18T15:30:00Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/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","level":"low"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"cwes":["CWE-266"],"updated_at":"2026-11-02T14:40:11.298154Z"}],"nvd":[{"id":"CVE-2026-44997","description":"OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"published","published":"2026-05-11T18:16:39.67Z","modified":"2026-06-17T10:51:34.69Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/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","level":"low","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-266"],"updated_at":"2026-11-02T14:12:18.239974Z"}],"osv":[{"id":"CVE-2026-44997","title":"OpenClaw \u003c 2026.4.22 - Security Envelope Constraint Bypass in ACP Child Sessions","description":"OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"published","published":"2026-05-11T16:46:36.591Z","modified":"2026-10-28T02:30:27.087616738Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"cwes":["CWE-266"],"updated_at":"2026-11-02T15:45:05.172514Z"},{"id":"GHSA-q3jj-46pq-826r","title":"OpenClaw's ACP child sessions inherit subagent security envelope constraints","description":"## Summary\nACP child sessions inherit subagent security envelope constraints.\n\n## Affected Packages / Versions\n- Package: openclaw (npm)\n- Affected versions: \u003c= 2026.4.21\n- Fixed version: 2026.4.22\n\n## Impact\nA restricted subagent spawning an ACP child session could fail to carry forward subagent-only constraints such as depth, child-count limits, control scope, or target-agent restrictions.\n\n## Fix\nACP spawn now resolves and persists child subagent envelope fields, enforces maximum depth and active-child caps, and applies the inherited control scope to child ACP sessions.\n\n## Fix Commit(s)\n- 31160dc069b7cc5d833b39c53736a41ad3befda2\n\n## Verification\n- The fix commit is contained in the public v2026.4.22 tag.\n- openclaw@2026.4.22 is published on npm and the compiled package contains the fix.\n- Focused regression coverage for this path passed before publication.\n\nOpenClaw thanks @zsxsoft, @qclawer, and @KeenSecurityLab for reporting.","status":"published","published":"2026-05-04T20:21:49Z","modified":"2026-05-19T16:11:27.417037Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-277"],"updated_at":"2026-11-02T15:46:54.055966Z"},{"id":"GHSA-w626-296m-8f85","title":"Duplicate Advisory: OpenClaw's ACP child sessions inherit subagent security envelope constraints","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-q3jj-46pq-826r. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-count limits, control scope, or target-agent restrictions. Attackers can exploit this by spawning child sessions that bypass subagent-only constraints, potentially escalating privileges or accessing restricted resources.","status":"withdrawn","published":"2026-05-11T18:31:46Z","modified":"2026-05-18T15:49:43.302261Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/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","level":"low"}],"cwes":["CWE-266"],"updated_at":"2026-11-02T15:46:58.04805Z"}]}}