CVE-2026-111618CWE-22path-traversal

CVE-2026-111618

Medium · published October 16, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
27.7
In the wild
Unconfirmed
What it is

CoAI (Chat Nio) through 4.0.0 contains an unauthenticated path traversal vulnerability in the generation and article archive download endpoints via the hash query parameter. Attackers can supply ../ sequences in hash to download any readable .tar.gz or .zip file, including other users' generated archives.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00353 · 27.7th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-16T22:17Z
References (5)
https://github.com/coaidev/coai/blob/v4.0.0/addition/article/api.go#L25-L35 · [email protected]https://github.com/coaidev/coai/blob/v4.0.0/addition/generation/api.go#L19-L29 · [email protected]https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal · [email protected]https://www.vulncheck.com/advisories/coai-through-4.0.0-unauthenticated-path-traversal-via-archive-download-endpoints · [email protected]https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:38Z
    CoAI through 4.0.0 Unauthenticated Path Traversal via Archive Download Endpoints
    cvelistv5
  • 16 OCT 17:38Z
    CoAI through 4.0.0 Unauthenticated Path Traversal via Archive Download Endpoints
    cvelistv5