CVE-2026-108839
thClaws through 0.141.0 Symlink Following File Write via POST /v1/inputs
CVSS Score
4.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-59 |
| Vendor | thclaws |
| Product | thclaws |
| Published | Oct 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
thClaws / thClaws
0 ≤ 0.141.0
References
hackmd.io: https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/thclaws-api-inputs-symlink-escape github.com: https://github.com/thClaws/thClaws/blob/v0.141.0/crates/core/src/api_v1/artifacts.rs#L335-L420 github.com: https://github.com/thClaws/thClaws vulncheck.com: https://www.vulncheck.com/advisories/thclaws-through-0.141.0-symlink-following-file-write-via-post-v1-inputs
Credits
hieuPenguinnn