{"id":"CVE-2026-35633","aliases":["EUVD-2026-21122","GHSA-4qwc-c7g9-4xcw","GHSA-hm63-vwj4-mj2q"],"status":"published","title":"OpenClaw \u003c 2026.3.22 - Unbounded Memory Allocation via Remote Media Error Responses","description":"OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00374,"percentile":0.31797,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-770","CWE-789"],"published":"2026-03-26T19:50:06Z","modified":"2026-11-11T23:10:00Z","fixes":[{"ecosystem":"npm","package":"openclaw","fixed_in":["2026.3.22"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"openclaw","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.3.22"}]}]},{"source":"osv","ecosystem":"npm","package":"openclaw","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.3.22"}]}]}],"products":[{"vendor":"openclaw","product":"openclaw"}],"references":[{"url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-4qwc-c7g9-4xcw","tags":["vendor-advisory","Vendor Advisory","advisory","web"]},{"url":"https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87","tags":["patch","Patch","fix","web"]},{"url":"https://github.com/openclaw/openclaw/commit/81445a901091a5d27ef0b56fceedbe4724566438","tags":["patch","Patch","fix","web"]},{"url":"https://www.vulncheck.com/advisories/openclaw-unbounded-memory-allocation-via-remote-media-error-responses","tags":["third-party-advisory","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35633","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4qwc-c7g9-4xcw"},{"url":"https://github.com/advisories/GHSA-hm63-vwj4-mj2q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35633.json","tags":["advisory"]},{"url":"https://github.com/openclaw/openclaw","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-35633","title":"OpenClaw \u003c 2026.3.22 - Unbounded Memory Allocation via Remote Media Error Responses","description":"OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"published","published":"2026-04-09T21:27:03.6Z","modified":"2026-06-23T16:15:55.023Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:20:05.15083Z"}],"euvd":[{"id":"EUVD-2026-21122","description":"OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"published","published":"2026-04-09T21:27:03Z","modified":"2026-06-23T16:15:55Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:31.896888Z"}],"ghsa":[{"id":"GHSA-4qwc-c7g9-4xcw","title":"OpenClaw: Remote media error responses could trigger unbounded memory allocation before failure","description":"## Summary\nRemote media HTTP error bodies were read without a hard size cap before failure handling, allowing unbounded allocation on error responses.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected: \u003c 2026.3.22\n- Fixed: \u003e= 2026.3.22\n- Latest released tag checked: `v2026.3.23-2` (`630f1479c44f78484dfa21bb407cbe6f171dac87`)\n- Latest published npm version checked: `2026.3.23-2`\n\n## Fix Commit(s)\n- `81445a901091a5d27ef0b56fceedbe4724566438`\n\n## Release Status\nThe fix shipped in `v2026.3.22` and remains present in `v2026.3.23` and `v2026.3.23-2`.\n\n## Code-Level Confirmation\n- src/media/fetch.ts now routes non-2xx failures through bounded prefix reads instead of buffering the whole error body.\n- src/media/read-response-with-limit.ts enforces capped reads and truncates oversized snippets before surfacing failure text.\n\nOpenClaw thanks @YLChen-007 for reporting.","status":"published","published":"2026-03-26T19:50:06Z","modified":"2026-07-01T02:41:39Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T14:40:36.577366Z"},{"id":"GHSA-hm63-vwj4-mj2q","title":"Duplicate Advisory: OpenClaw: Remote media error responses could trigger unbounded memory allocation before failure","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-4qwc-c7g9-4xcw. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"withdrawn","published":"2026-04-10T00:30:30Z","modified":"2026-04-10T20:19:32Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T14:39:53.087746Z"}],"nvd":[{"id":"CVE-2026-35633","description":"OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"published","published":"2026-04-09T22:16:32.187Z","modified":"2026-11-11T23:10:00.263Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-789","CWE-770"],"updated_at":"2026-11-12T01:26:58.520432Z"}],"osv":[{"id":"CVE-2026-35633","title":"OpenClaw \u003c 2026.3.22 - Unbounded Memory Allocation via Remote Media Error Responses","description":"OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"published","published":"2026-04-09T21:27:03.6Z","modified":"2026-10-28T02:31:09.462258926Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:45:02.673625Z"},{"id":"GHSA-4qwc-c7g9-4xcw","title":"OpenClaw: Remote media error responses could trigger unbounded memory allocation before failure","description":"## Summary\nRemote media HTTP error bodies were read without a hard size cap before failure handling, allowing unbounded allocation on error responses.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected: \u003c 2026.3.22\n- Fixed: \u003e= 2026.3.22\n- Latest released tag checked: `v2026.3.23-2` (`630f1479c44f78484dfa21bb407cbe6f171dac87`)\n- Latest published npm version checked: `2026.3.23-2`\n\n## Fix Commit(s)\n- `81445a901091a5d27ef0b56fceedbe4724566438`\n\n## Release Status\nThe fix shipped in `v2026.3.22` and remains present in `v2026.3.23` and `v2026.3.23-2`.\n\n## Code-Level Confirmation\n- src/media/fetch.ts now routes non-2xx failures through bounded prefix reads instead of buffering the whole error body.\n- src/media/read-response-with-limit.ts enforces capped reads and truncates oversized snippets before surfacing failure text.\n\nOpenClaw thanks @YLChen-007 for reporting.","status":"published","published":"2026-03-26T19:50:06Z","modified":"2026-04-10T20:42:17.99365Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-770"],"updated_at":"2026-11-02T15:46:37.528068Z"},{"id":"GHSA-hm63-vwj4-mj2q","title":"Duplicate Advisory: OpenClaw: Remote media error responses could trigger unbounded memory allocation before failure","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-4qwc-c7g9-4xcw. This link is maintained to preserve external references.\n\n### Original Description\nOpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.","status":"withdrawn","published":"2026-04-10T00:30:30Z","modified":"2026-04-10T20:33:54.829512Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:46:49.28217Z"}]}}