{"id":"CVE-2026-82393","state":"PUBLISHED","title":"pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install","description":"pnpm is a package manager. Prior to 10.34.5 and 11.11.0, pnpm accepts a scoped path traversal in a tarball dependency's package.json manifest name because pnpm11/resolving/npm-resolver/src/pickPackage.ts rejects slash characters only for unscoped names. During pnpm install, the unvalidated name reaches raw path joins in pnpm11/installing/deps-resolver/src/resolvePeers.ts, pnpm11/installing/deps-resolver/src/index.ts, and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts, causing package extraction outside node_modules and allowing attacker-controlled files to overwrite arbitrary filesystem paths even when --ignore-scripts is used. The overwrite can replace shell startup files, Git hooks, or installed package code and lead to code execution. This issue is fixed in versions 10.34.5, and 11.11.0.","publishedAt":"2026-08-31T21:12:09.196Z","updatedAt":"2026-09-02T03:55:39.345Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["pnpm pnpm"],"affected":[{"vendor":"pnpm","product":"pnpm","versions":[{"version":"< 10.34.5","status":"affected"},{"version":">= 11.0.0, < 11.11.0","status":"affected"}]}],"references":["https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m","https://github.com/pnpm/pnpm/pull/12872","https://github.com/pnpm/pnpm/pull/12890","https://github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7","https://github.com/pnpm/pnpm/commit/78e29fe5583a1e5d69ea05e414eff310f78d5ed9","https://github.com/pnpm/pnpm/releases/tag/v10.34.5","https://github.com/pnpm/pnpm/releases/tag/v11.11.0"],"weaknesses":["CWE-22","CWE-73","CWE-94"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82393.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82393","state":"PUBLISHED","datePublished":"2026-08-31T21:12:09.196Z","dateUpdated":"2026-09-02T03:55:39.345Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-28T22:00:43.511Z"},"containers":{"cna":{"title":"pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install","descriptions":[{"lang":"en","value":"pnpm is a package manager. Prior to 10.34.5 and 11.11.0, pnpm accepts a scoped path traversal in a tarball dependency's package.json manifest name because pnpm11/resolving/npm-resolver/src/pickPackage.ts rejects slash characters only for unscoped names. During pnpm install, the unvalidated name reaches raw path joins in pnpm11/installing/deps-resolver/src/resolvePeers.ts, pnpm11/installing/deps-resolver/src/index.ts, and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts, causing package extraction outside node_modules and allowing attacker-controlled files to overwrite arbitrary filesystem paths even when --ignore-scripts is used. The overwrite can replace shell startup files, Git hooks, or installed package code and lead to code execution. This issue is fixed in versions 10.34.5, and 11.11.0."}],"affected":[{"vendor":"pnpm","product":"pnpm","versions":[{"version":"< 10.34.5","status":"affected"},{"version":">= 11.0.0, < 11.11.0","status":"affected"}]}],"references":[{"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m","name":"https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pnpm/pnpm/pull/12872","name":"https://github.com/pnpm/pnpm/pull/12872","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/pull/12890","name":"https://github.com/pnpm/pnpm/pull/12890","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7","name":"https://github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/commit/78e29fe5583a1e5d69ea05e414eff310f78d5ed9","name":"https://github.com/pnpm/pnpm/commit/78e29fe5583a1e5d69ea05e414eff310f78d5ed9","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/releases/tag/v10.34.5","name":"https://github.com/pnpm/pnpm/releases/tag/v10.34.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/pnpm/pnpm/releases/tag/v11.11.0","name":"https://github.com/pnpm/pnpm/releases/tag/v11.11.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-73","lang":"en","description":"CWE-73: External Control of File Name or Path","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-31T21:12:09.196Z"},"source":{"advisory":"GHSA-vq4v-j7r6-jq4m","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-82393"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-02T03:55:39.345Z"}}]}}}