Vulnerability · Published Oct 10, 2026 · Assigned by VulnCheck

CVE-2026-108599Phi 0.1.1 through 0.28.4 Symlink Workspace Write Restriction Bypass

Medium 4.7

In plain English

A medium-severity security flaw in phi from pulseaiclub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)0.2%top 93.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

phi 0.1.1 through 0.28.4 contains an improper link resolution vulnerability that allows malicious repositories to bypass workspace_only_writes by exploiting lexical-only path checks in the permission gate. Attackers can commit symlinks pointing outside the workspace and use prompt injection to make the write tool write attacker-influenced content to external files without approval.

Affected products (as reported)

Vendor	Product	Versions
pulseaiclub	phi	0.1.1 – through 0.28.4

Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References

https://hackmd.io/@haind/phi-symlink-permission-boundary third-party-advisory
https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/permission/gate.go#L106-L119 technical-description
https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/tools/writetool/write.go#L64-L68 technical-description
https://github.com/pulseaiclub/phi product
VulnCheck Advisory: Phi 0.1.1 through 0.28.4 Symlink Workspace Write Restriction Bypass third-party-advisory