{"id":"CVE-2025-64755","aliases":["EUVD-2025-198355","GHSA-7mv8-j34q-vp7q"],"status":"published","title":"@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes","description":"Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0062,"percentile":0.50029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2025-11-20T21:28:08Z","modified":"2026-10-18T20:10:00Z","fixes":[{"ecosystem":"npm","package":"@anthropic-ai/claude-code","fixed_in":["2.0.31"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@anthropic-ai/claude-code","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.31"}]}]},{"source":"osv","ecosystem":"npm","package":"@anthropic-ai/claude-code","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.0.31"}]}]}],"products":[{"vendor":"anthropic","product":"claude_code"},{"vendor":"anthropics","product":"claude-code"}],"references":[{"url":"https://github.com/anthropics/claude-code/security/advisories/GHSA-7mv8-j34q-vp7q","tags":["x_refsource_CONFIRM","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-64755","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-7mv8-j34q-vp7q"},{"url":"https://github.com/anthropics/claude-code","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-64755","title":"@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes","description":"Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.","status":"published","published":"2025-11-21T01:13:05.579Z","modified":"2025-11-24T18:13:06.459Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:32:46.750177Z"}],"euvd":[{"id":"EUVD-2025-198355","description":"Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.","status":"published","published":"2025-11-21T01:13:05Z","modified":"2025-11-24T18:13:06Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:49:13.187271Z"}],"ghsa":[{"id":"GHSA-7mv8-j34q-vp7q","title":"@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes","description":"Due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. \n\nUsers on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.\n\nThank you to Adam Chester - SpecterOps for reporting this issue!","status":"published","published":"2025-11-20T21:28:08Z","modified":"2025-11-21T15:32:14Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:39:10.178331Z"}],"nvd":[{"id":"CVE-2025-64755","description":"Claude Code is an agentic coding tool. Prior to version 2.0.31, due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. This issue has been patched in version 2.0.31.","status":"published","published":"2025-11-21T02:15:43.917Z","modified":"2026-10-18T20:10:00.11Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:11:46.009629Z"}],"osv":[{"id":"GHSA-7mv8-j34q-vp7q","title":"@anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes","description":"Due to an error in sed command parsing, it was possible to bypass the Claude Code read-only validation and write to arbitrary files on the host system. \n\nUsers on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.\n\nThank you to Adam Chester - SpecterOps for reporting this issue!","status":"published","published":"2025-11-20T21:28:08Z","modified":"2025-11-21T15:32:13Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:46:41.349637Z"}]}}