CVE-2026-122235— Jan 0.8.5 before 0.8.8 Workspace Guard Bypass via Dangling Symlink

Quick assessment

Affected

janhq jan

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jan 版本 0.8.5 至 0.8.8（不含 0.8.8）存在一个工作区防护绕过漏洞，位于中。该漏洞允许攻击者利用悬空符号链接（dangling symlinks），将文件写入到工作区之外。攻击者可通过提供恶意仓库，利用提示注入（prompt injection）诱导写入或编辑工具跟随符号链接，从而在主机上创建诸如等文件。

CVSS 4.7 · Medium Updated Nov 05, 2026

Possible ATT&CK Techniques 2 AI

T1561 · Disk Wipe T1059 · Command and Scripting Interpreter

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Vulnerability Information

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Vulnerability Title

Jan 0.8.5 before 0.8.8 Workspace Guard Bypass via Dangling Symlink

Source: CVE Program / CVE List V5

Vulnerability Description

Jan from 0.8.5 before 0.8.8 contains a workspace guard bypass vulnerability in the agent-tools gate.rs that allows attackers to write files outside the workspace via dangling symlinks. Attackers supplying a malicious repository can use prompt injection to make the write or edit tools follow symlinks, creating files like ~/.ssh/authorized_keys on the host.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在文件访问前对链接解析不恰当(链接跟随)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
janhq	jan	0.8.5 ~ 0.8.8	-

II. Public POCs for CVE-2026-122235

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-122235

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Other References for CVE-2026-122235 (5)

https://github.com/janhq/jan/pull/9424 patch issue-tracking
https://github.com/janhq/jan/commit/840c33e65182ba9975d32f710c5d111e25444b65 patch
https://github.com/janhq/jan/releases/tag/v0.8.8 release-notes
https://github.com/janhq/jan/security/advisories/GHSA-7j4g-mj5j-p842 vendor-advisory
https://www.vulncheck.com/advisories/jan-0.8.5-before-0.8.8-workspace-guard-bypass-via-dangling-symlink third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-122235

IV. Related Vulnerabilities

Same product: jan

CVE-2026-66005
Jan Local API Server CORS Origin Reflection via 0.0.0.0 Bind

Same vendor: janhq

CVE-2026-66005
Jan Local API Server CORS Origin Reflection via 0.0.0.0 Bind

Same weakness: CWE-59