CVE-2026-54328highCWE-379

CVE-2026-54328: high-severity vulnerability in earendil-works pi

Pi: Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.3epss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
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/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected products
earendil-works · pi
Related CVEs — earendil-works pi

In the same product, most dangerous first.

CVE-2026-54326LOWPi: Potential XSS in HTML session exports via Markdown URL sanitization bypassEPSS 0.2%CVE-2026-54325MEDIUMPi loads project-local extensions without approvalEPSS 0.2%CVE-2026-54327LOWPi: Race condition in auth.json writes could expose stored credentialsEPSS 0.1%
References
https://github.com/earendil-works/pi/commit/a98e087e5d08ea2a536bf73dbb0aebb87c3ef72ehttps://github.com/earendil-works/pi/commit/ea3465a8e371a12d0167a06b60f93878e3a3df44https://github.com/earendil-works/pi/pull/5345https://github.com/earendil-works/pi/releases/tag/v0.78.1https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94