CVE-2026-54328
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-379
- Source
- security-advisories@github.com
References
- https://github.com/earendil-works/pi/commit/a98e087e5d08ea2a536bf73dbb0aebb87c3ef72e
- https://github.com/earendil-works/pi/commit/ea3465a8e371a12d0167a06b60f93878e3a3df44
- https://github.com/earendil-works/pi/pull/5345
- https://github.com/earendil-works/pi/releases/tag/v0.78.1
- https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.