CVE-2026-73258

Description

Mongoose is an embedded web server and network library. Prior to 7.22, a remote attacker can place a lone carriage return or line feed in multipart input processed by mg_http_next_multipart() in src/http.c. The loops comparing s[b] and s[b + 1], and s[h2] and s[h2 + 1], use an incorrect AND condition and stop when either character resembles part of a CRLF terminator. This truncates headers, filenames, or boundaries and can cause an application to accept dangerous content after seeing a misleading Content-Type value. This issue is fixed in version 7.22.

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Produits concernés

• cesanta mongoose

Scores CVSS

Faiblesses (CWE)

• CWE-697

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-cc55-8v3r-59p8 ExploitVendor Advisory
• https://github.com/cesanta/mongoose/security/advisories/GHSA-cc55-8v3r-59p8 ExploitVendor Advisory

Ailleurs

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