CVE-2026-111618

Description

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.

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