{"id":"CVE-2026-54328","state":"PUBLISHED","title":"Pi: Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts","description":"Pi is a minimal terminal coding harness. From 0.74.0 until 0.78.1, Pi versions with temporary npm or git extension package installs used predictable paths under the operating system temporary directory. On Linux-based multi-user systems, a local attacker who can write to the shared temporary directory could prepare the expected package location before another user runs pi with a temporary extension package source. Pi could then load attacker-controlled extension code in the victim user's process.  This vulnerability is fixed in 0.78.1.","publishedAt":"2026-06-23T19:25:04.051Z","updatedAt":"2026-06-24T13:38:04.242Z","severity":{"score":7.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["earendil-works pi"],"affected":[{"vendor":"earendil-works","product":"pi","versions":[{"version":">= 0.74.0, < 0.78.1","status":"affected"}]}],"references":["https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94","https://github.com/earendil-works/pi/pull/5345","https://github.com/earendil-works/pi/commit/a98e087e5d08ea2a536bf73dbb0aebb87c3ef72e","https://github.com/earendil-works/pi/commit/ea3465a8e371a12d0167a06b60f93878e3a3df44","https://github.com/earendil-works/pi/releases/tag/v0.78.1"],"weaknesses":["CWE-379"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54328.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54328","state":"PUBLISHED","datePublished":"2026-06-23T19:25:04.051Z","dateUpdated":"2026-06-24T13:38:04.242Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-12T18:42:02.224Z"},"containers":{"cna":{"title":"Pi: Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts","descriptions":[{"lang":"en","value":"Pi is a minimal terminal coding harness. From 0.74.0 until 0.78.1, Pi versions with temporary npm or git extension package installs used predictable paths under the operating system temporary directory. On Linux-based multi-user systems, a local attacker who can write to the shared temporary directory could prepare the expected package location before another user runs pi with a temporary extension package source. Pi could then load attacker-controlled extension code in the victim user's process.  This vulnerability is fixed in 0.78.1."}],"affected":[{"vendor":"earendil-works","product":"pi","versions":[{"version":">= 0.74.0, < 0.78.1","status":"affected"}]}],"references":[{"url":"https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94","name":"https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/earendil-works/pi/pull/5345","name":"https://github.com/earendil-works/pi/pull/5345","tags":["x_refsource_MISC"]},{"url":"https://github.com/earendil-works/pi/commit/a98e087e5d08ea2a536bf73dbb0aebb87c3ef72e","name":"https://github.com/earendil-works/pi/commit/a98e087e5d08ea2a536bf73dbb0aebb87c3ef72e","tags":["x_refsource_MISC"]},{"url":"https://github.com/earendil-works/pi/commit/ea3465a8e371a12d0167a06b60f93878e3a3df44","name":"https://github.com/earendil-works/pi/commit/ea3465a8e371a12d0167a06b60f93878e3a3df44","tags":["x_refsource_MISC"]},{"url":"https://github.com/earendil-works/pi/releases/tag/v0.78.1","name":"https://github.com/earendil-works/pi/releases/tag/v0.78.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-379","lang":"en","description":"CWE-379: Creation of Temporary File in Directory with Insecure Permissions","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-23T19:25:04.051Z"},"source":{"advisory":"GHSA-jfgx-wxx8-mp94","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-24T13:37:52.524343Z","id":"CVE-2026-54328","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-24T13:38:04.242Z"}}]}}}