{"id":"CVE-2026-115473","published":"2026-11-04T22:17:50.503","lastModified":"2026-11-04T22:17:50.503","description":"Mongoose is an embedded web server and network library. Prior to 7.22, mg_path_is_sane in src/util.c read path.buf[1] without first requiring path.len to be at least two and read s[2] when only two bytes remained. Unauthenticated remote requests reaching mg_http_upload or mg_http_serve_dir with the affected short path shapes could therefore trigger one-byte heap out-of-bounds reads. On bare-metal or RTOS targets without memory protection, the adjacent byte could be exposed or influence whether a path was accepted, and instrumented builds could crash. This issue is fixed in version 7.22.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","cwes":["CWE-125","CWE-158"],"vendors":[],"products":[],"references":[{"url":"https://github.com/cesanta/mongoose/commit/b55de8b151d1466a3e41d1f854f22eeb6faa23dc","tags":[]},{"url":"https://github.com/cesanta/mongoose/releases/tag/7.22","tags":[]},{"url":"https://github.com/cesanta/mongoose/security/advisories/GHSA-cjmx-764f-286c","tags":[]}],"exploitRefs":[{"url":"https://github.com/cesanta/mongoose/commit/b55de8b151d1466a3e41d1f854f22eeb6faa23dc","tags":[]},{"url":"https://github.com/cesanta/mongoose/releases/tag/7.22","tags":[]},{"url":"https://github.com/cesanta/mongoose/security/advisories/GHSA-cjmx-764f-286c","tags":[]}],"hasPoc":true,"ai":null}