What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-10 · updated 2026-10-16
• Weakness: CWE-59

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

• pulseaiclub phi: from 0.1.1 through 0.28.4

References

• https://github.com/pulseaiclub/phi
• https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/permission/gate.go#L106-L119
• https://github.com/pulseaiclub/phi/blob/5b3cb440a7c58115ef64283a737a43299f2805a4/internal/tools/writetool/write.go#L64-L68
• https://hackmd.io/@haind/phi-symlink-permission-boundary
• https://www.vulncheck.com/advisories/phi-0.1.1-through-0.28.4-symlink-workspace-write-restriction-bypass

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