CVE-2026-111618

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.

CVSS 4.0

6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-10-16

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

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

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