vulnerability / NVI-00016117 / Revision 2
Pi Agent: Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts
GitHub lists this reviewed advisory for @earendil-works/pi-coding-agent, @mariozechner/pi-coding-agent. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.3 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
7.3 HIGH (3.1)
security-advisories@github.com severity; no combined Null risk score.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
@earendil-works/pi-coding-agent
source listed>= 0.74.0, < 0.78.1
# Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts 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. ## Info The vulnerable code path affected temporary extension package sources loaded with `--extension` or `-e`, specifically npm and git package sources. The temporary npm install root and temporary git clone paths were deterministic and rooted under `os.tmpdir()/pi-extensions`. The path was derived from public source information rather than from a per-user private directory or an unpredictable temporary directory. During resource resolution, pi considered an npm package or git checkout present if the expected package path already existed. Extension resources discovered from that package location were then loaded by the extension loader. Because ext
@mariozechner/pi-coding-agent
source listed>= 0.50.0, <= 0.73.1
# Predictable temporary extension install paths allow local privilege escalation on shared Linux hosts 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. ## Info The vulnerable code path affected temporary extension package sources loaded with `--extension` or `-e`, specifically npm and git package sources. The temporary npm install root and temporary git clone paths were deterministic and rooted under `os.tmpdir()/pi-extensions`. The path was derived from public source information rather than from a per-user private directory or an unpredictable temporary directory. During resource resolution, pi considered an npm package or git checkout present if the expected package path already existed. Extension resources discovered from that package location were then loaded by the extension loader. Because ext
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. NIST National Vulnerability Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-jfgx-wxx8-mp94 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
- CVE-2026-54328 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.