CVE-2026-54328
Pi: Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts
- State
- Published
- Severity
- 7.3 High
- Published
- Jun 23, 2026
- Updated
- Jun 24, 2026
- Reserved
- Jun 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-379 Creation of Temporary File in Directory with Insecure Permissions
Affected Products
| Product | Versions |
|---|---|
piearendil-works |
|
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
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