MediumVulnerabilityLLM-specific

CVE-2026-122235: Jan workspace guard bypass allows file writes outside workspace via symlinks

Source: NVD(opens in a new tab)
Identifier: CVE-2026-122235
Published: November 4, 2026
Record updated: November 4, 2026

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

Summary

Jan, from version 0.8.5 before 0.8.8, contains a workspace guard bypass in the agent-tools gate.rs file. Attackers who supply a malicious repository can use prompt injection to make the write or edit tools follow dangling symlinks, letting them create files outside the workspace, such as ~/.ssh/authorized_keys on the host.

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 November 4, 2026.
Disclosure date: November 4, 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-2026-122235

First tracked: November 4, 2026 at 07:10 PM ET, from NVD/CVE Database

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

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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