CVE-2026-73257

Description

Mongoose is an embedded web server and network library. Priro to version 7.22, a remote unauthenticated attacker can send an HTTP request containing both Content-Length and Transfer-Encoding: chunked. The cl_count and te_count checks in the mg_http_parse() and http_cb() paths in src/http.c accept both headers and prioritize chunked encoding, while a Content-Length-preferring reverse proxy can use a different request boundary. This CL.TE desynchronization can inject requests that access or modify resources in another user context. This issue is fixed in version 7.22.

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Produits concernés

• cesanta mongoose

Scores CVSS

Faiblesses (CWE)

• CWE-444

Références

• https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71 Patch
• https://github.com/cesanta/mongoose/pull/3611 Issue TrackingPatch
• https://github.com/cesanta/mongoose/releases/tag/7.22 Release Notes
• https://github.com/cesanta/mongoose/security/advisories/GHSA-5wfq-r6mr-wqp6 ExploitVendor Advisory
• https://github.com/cesanta/mongoose/security/advisories/GHSA-5wfq-r6mr-wqp6 ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories