MediumVulnerabilityLLM-specific

CVE-2026-108599: phi symlink escape in permission gate allows writes outside workspace

Source: NVD(opens in a new tab)
Identifier: CVE-2026-108599
Published: October 10, 2026
Record updated: October 10, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

phi versions 0.1.1 through 0.28.4 contain an improper link resolution flaw (CVE-2026-108599). Malicious repositories can commit symlinks that point outside the workspace, bypassing workspace_only_writes because the permission gate performs only lexical path checks. Prompt injection can then make the write tool write attacker-influenced content to external files without approval.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 4.7(medium)
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector: local
Attack complexity: high
Privileges required: none
User interaction: required
EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 10, 2026.
Disclosure date: October 10, 2026

Weaknesses and techniques

Weakness (CWE): CWE-59
AI threat technique (MITRE ATLAS): AML.T0051

Classification

Attack type: Prompt injection,
Other
Attack sophistication: Moderate
AI component targeted: Agent
Impact: Integrity,
Confidentiality
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-108599

First tracked: October 10, 2026 at 08:09 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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