---
id: CVE-2026-108839
title: >-
  thClaws through 0.141.0 contains a link-following vulnerability in the
  post_inputs handler of the v1 API POST /v1/inputs endpoint that allows writes
  outside the workspace by following symlinks
summary: >-
  thClaws through 0.141.0 contains a link-following vulnerability in the
  post_inputs handler of the v1 API POST /v1/inputs endpoint that allows writes
  outside the workspace by following symlinks. Attackers who plant a symlink
  under the all…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L'
cwe:
  - CWE-59
published: '2026-10-11'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T14:17:04.390'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108839'
references:
  - url: 'https://github.com/thClaws/thClaws'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/thClaws/thClaws/blob/v0.141.0/crates/core/src/api_v1/artifacts.rs#L335-L420
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/thclaws-api-inputs-symlink-escape
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/thclaws-through-0.141.0-symlink-following-file-write-via-post-v1-inputs
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T14:50:34.050Z'
---

## Overview

thClaws through 0.141.0 contains a link-following vulnerability in the post_inputs handler of the v1 API POST /v1/inputs endpoint that allows writes outside the workspace by following symlinks. Attackers who plant a symlink under the allowed inputs/ prefix can cause later authenticated uploads to write or truncate files outside the workspace with daemon privileges.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.