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CVE-2026-86542— knowns before 0.30.0 Path Traversal via Import Name

Quick assessment

Affected

knowns-dev knowns

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.

在 0.30.0 之前的已知版本中，导入路由未对导入名称进行验证，使得未认证的攻击者能够向导入目录之外的位置写入文件。攻击者可以在参数中提供路径遍历序列，从而跳出导入目录，覆盖服务器进程可写的任意文件。

CVSS 9.1 · Critical Updated Sep 08, 2026

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

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Vulnerability Information

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Vulnerability Title

knowns before 0.30.0 Path Traversal via Import Name

Source: CVE Program / CVE List V5

Vulnerability Description

knowns before 0.30.0 fails to validate import names in the import routes, allowing unauthenticated attackers to write files outside the imports directory. Attackers can supply traversal sequences in the name parameter to escape the imports directory and overwrite arbitrary files writable by the server process.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
knowns-dev	knowns	0 ~ 0.30.0	-

II. Public POCs for CVE-2026-86542

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-86542

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Patches & Fixes for CVE-2026-86542 (2)

Vendor Advisories for CVE-2026-86542 (2)

Proof of Concept for CVE-2026-86542 (1)

🔗 knowns/internal/server/routes/imports.go at v0.29.1 · knowns-dev/knowns · GitHub Read full article technical-description

Vendor Pages for CVE-2026-86542 (1)

🔗 Release v0.30.0 · knowns-dev/knowns · GitHub release-notes

https://www.cve.org/CVERecord?id=CVE-2026-86542

Same Patch Batch · knowns-dev · 2026-09-07 · 8 CVEs total

CVE-2026-86543	9.8 CRITICAL	knowns before 0.30.0 Unauthenticated Management API Exposure
CVE-2026-86439	8.8 HIGH	knowns before 0.30.0 Path Traversal via MCP doc and memory tools
CVE-2026-86541	8.3 HIGH	knowns before 0.30.0 Path Traversal via code.replace MCP action
CVE-2026-86544	8.1 HIGH	knowns before 0.30.0 Authorization Bypass via Misclassified Code Actions
CVE-2026-86540	7.8 HIGH	knowns before 0.30.0 Arbitrary Code Execution via LSP Binary
CVE-2026-86538	7.5 HIGH	knowns before 0.30.0 Path Traversal via templateFile parameter
CVE-2026-86539	7.2 HIGH	knowns through 0.33.0 Server-Side Request Forgery via embedding-models endpoint

IV. Related Vulnerabilities

Same product: knowns

Same vendor: knowns-dev

Same weakness: CWE-22

V. Comments for CVE-2026-86542

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-86542— knowns before 0.30.0 Path Traversal via Import Name

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2026-86542

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-86542

III. Intelligence Information for CVE-2026-86542

Patches & Fixes for CVE-2026-86542 (2)

Vendor Advisories for CVE-2026-86542 (2)

Proof of Concept for CVE-2026-86542 (1)

Vendor Pages for CVE-2026-86542 (1)

Same Patch Batch · knowns-dev · 2026-09-07 · 8 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-86542

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