{"id":"CVE-2026-27523","aliases":["EUVD-2026-12734","GHSA-m8v2-6wwh-r4gc"],"status":"published","title":"OpenClaw \u003c 2026.2.24 - Sandbox Bind Validation Bypass via Symlink-Parent Missing-Leaf Paths","description":"OpenClaw versions prior to 2026.2.24 contain a sandbox bind validation vulnerability allowing attackers to bypass allowed-root and blocked-path checks via symlinked parent directories with non-existent leaf paths. Attackers can craft bind source paths that appear within allowed roots but resolve outside sandbox boundaries once missing leaf components are created, weakening bind-source isolation enforcement.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0027,"percentile":0.19373,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22","CWE-59"],"published":"2026-03-03T23:10:01Z","modified":"2026-10-28T02:30:54Z","fixes":[{"ecosystem":"npm","package":"openclaw","fixed_in":["2026.2.24"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"openclaw","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2026.2.23"},{"fixed":"2026.2.24"}]}]},{"source":"osv","ecosystem":"npm","package":"openclaw","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.2.24"}]}]}],"products":[{"vendor":"openclaw","product":"openclaw"}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-m8v2-6wwh-r4gc","tags":["vendor-advisory","Vendor Advisory","advisory","web"]},{"url":"https://github.com/openclaw/openclaw/commit/b5787e4abba0dcc6baf09051099f6773c1679ec1","tags":["patch","Patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/openclaw-sandbox-bind-validation-bypass-via-symlink-parent-missing-leaf-paths","tags":["third-party-advisory","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27523","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m8v2-6wwh-r4gc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27523.json","tags":["advisory"]},{"url":"https://github.com/openclaw/openclaw","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-27523","title":"OpenClaw \u003c 2026.2.24 - Sandbox Bind Validation Bypass via Symlink-Parent Missing-Leaf Paths","description":"OpenClaw versions prior to 2026.2.24 contain a sandbox bind validation vulnerability allowing attackers to bypass allowed-root and blocked-path checks via symlinked parent directories with non-existent leaf paths. Attackers can craft bind source paths that appear within allowed roots but resolve outside sandbox boundaries once missing leaf components are created, weakening bind-source isolation enforcement.","status":"published","published":"2026-03-18T01:34:27.047Z","modified":"2026-06-23T16:14:08.284Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:19:48.826324Z"}],"euvd":[{"id":"EUVD-2026-12734","description":"OpenClaw versions prior to 2026.2.24 contain a sandbox bind validation vulnerability allowing attackers to bypass allowed-root and blocked-path checks via symlinked parent directories with non-existent leaf paths. Attackers can craft bind source paths that appear within allowed roots but resolve outside sandbox boundaries once missing leaf components are created, weakening bind-source isolation enforcement.","status":"published","published":"2026-03-18T01:34:27Z","modified":"2026-06-23T16:14:08Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:32.768333Z"}],"ghsa":[{"id":"GHSA-m8v2-6wwh-r4gc","title":"OpenClaw's sandbox bind validation could bypass allowed-root and blocked-path checks via symlink-parent missing-leaf paths","description":"### Summary\nIn `openclaw` up to and including **2026.2.23** (latest npm release as of **February 24, 2026**), sandbox bind-source validation could be bypassed when a bind source used a symlinked parent plus a non-existent leaf path.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected: `\u003c= 2026.2.23`\n- Patched: `\u003e= 2026.2.24` (planned next release)\n\n### Root Cause\n`validateBindMounts` previously relied on full-path realpath only when the full source path already existed. For missing-leaf paths, parent symlink traversal was not fully canonicalized before allowed-root and blocked-path checks.\n\n### Security Impact\nA source path that looked inside an allowed root could resolve outside that root (including blocked runtime paths) once the missing leaf was created, weakening sandbox bind-source boundary enforcement.\n\n### Fix\nThe validation path now canonicalizes through the nearest existing ancestor, then always re-checks the canonical path against both:\n- allowed source roots\n- blocked runtime paths\n\n### Verification\n- `pnpm check`\n- `pnpm exec vitest run --config vitest.gateway.config.ts`\n- `pnpm test:fast`\n- Added regression tests for symlink-parent + missing-leaf bypass patterns.\n\n### Fix Commit(s)\n- `b5787e4abba0dcc6baf09051099f6773c1679ec1`\n\n### Release Process Note\n`patched_versions` is pre-set to the planned next release (`2026.2.24`) so after npm publish the advisory can be published without further field edits.\n\nOpenClaw thanks @tdjackey for reporting.\n\n\n### Publication Update (2026-02-25)\n`openclaw@2026.2.24` is published on npm and contains the fix commit(s) listed above. This advisory now marks `\u003e= 2026.2.24` as patched.","status":"published","published":"2026-03-03T23:10:01Z","modified":"2026-03-18T21:52:36Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","level":"high"}],"cwes":["CWE-22","CWE-59"],"updated_at":"2026-11-02T14:39:37.554665Z"}],"nvd":[{"id":"CVE-2026-27523","description":"OpenClaw versions prior to 2026.2.24 contain a sandbox bind validation vulnerability allowing attackers to bypass allowed-root and blocked-path checks via symlinked parent directories with non-existent leaf paths. Attackers can craft bind source paths that appear within allowed roots but resolve outside sandbox boundaries once missing leaf components are created, weakening bind-source isolation enforcement.","status":"published","published":"2026-03-18T02:16:23.42Z","modified":"2026-06-17T10:27:18.337Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:12:09.735529Z"}],"osv":[{"id":"CVE-2026-27523","title":"OpenClaw \u003c 2026.2.24 - Sandbox Bind Validation Bypass via Symlink-Parent Missing-Leaf Paths","description":"OpenClaw versions prior to 2026.2.24 contain a sandbox bind validation vulnerability allowing attackers to bypass allowed-root and blocked-path checks via symlinked parent directories with non-existent leaf paths. Attackers can craft bind source paths that appear within allowed roots but resolve outside sandbox boundaries once missing leaf components are created, weakening bind-source isolation enforcement.","status":"published","published":"2026-03-18T01:34:27.047Z","modified":"2026-10-28T02:30:54.226231797Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T15:45:00.180685Z"},{"id":"GHSA-m8v2-6wwh-r4gc","title":"OpenClaw's sandbox bind validation could bypass allowed-root and blocked-path checks via symlink-parent missing-leaf paths","description":"### Summary\nIn `openclaw` up to and including **2026.2.23** (latest npm release as of **February 24, 2026**), sandbox bind-source validation could be bypassed when a bind source used a symlinked parent plus a non-existent leaf path.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected: `\u003c= 2026.2.23`\n- Patched: `\u003e= 2026.2.24` (planned next release)\n\n### Root Cause\n`validateBindMounts` previously relied on full-path realpath only when the full source path already existed. For missing-leaf paths, parent symlink traversal was not fully canonicalized before allowed-root and blocked-path checks.\n\n### Security Impact\nA source path that looked inside an allowed root could resolve outside that root (including blocked runtime paths) once the missing leaf was created, weakening sandbox bind-source boundary enforcement.\n\n### Fix\nThe validation path now canonicalizes through the nearest existing ancestor, then always re-checks the canonical path against both:\n- allowed source roots\n- blocked runtime paths\n\n### Verification\n- `pnpm check`\n- `pnpm exec vitest run --config vitest.gateway.config.ts`\n- `pnpm test:fast`\n- Added regression tests for symlink-parent + missing-leaf bypass patterns.\n\n### Fix Commit(s)\n- `b5787e4abba0dcc6baf09051099f6773c1679ec1`\n\n### Release Process Note\n`patched_versions` is pre-set to the planned next release (`2026.2.24`) so after npm publish the advisory can be published without further field edits.\n\nOpenClaw thanks @tdjackey for reporting.\n\n\n### Publication Update (2026-02-25)\n`openclaw@2026.2.24` is published on npm and contains the fix commit(s) listed above. This advisory now marks `\u003e= 2026.2.24` as patched.","status":"published","published":"2026-03-03T23:10:01Z","modified":"2026-03-18T22:01:28.843238Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N","level":"high"}],"cwes":["CWE-22","CWE-59"],"updated_at":"2026-11-02T15:46:51.463834Z"}]}}