CVE-2026-111618

MEDIUM 5.3

CoAI through 4.0.0 Unauthenticated Path Traversal via Archive Download Endpoints

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	coaidev
Product	coai
Published	Oct 16, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

coaidev / CoAI

0 ≤ 4.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hackmd.io: https://hackmd.io/@hieuPenguinnn/coai-chatnio-generation-article-download-path-traversal github.com: https://github.com/coaidev/coai/blob/v4.0.0/addition/generation/api.go#L19-L29 github.com: https://github.com/coaidev/coai/blob/v4.0.0/addition/article/api.go#L25-L35 vulncheck.com: https://www.vulncheck.com/advisories/coai-through-4.0.0-unauthenticated-path-traversal-via-archive-download-endpoints

Credits

hieuPenguinnn