{"apiVersion":"1.0","identifier":"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.","publishedAt":"2026-08-20T18:16:46","lastModifiedAt":"2026-08-20T20:17:46","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73257","cvssScore":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","epssProbability":0.00376,"riskScore":0.94,"affectedProduct":"Mongoose","affectedVersions":"<7.22","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73257","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73257","en":"https://www.redsauce.net/en/cves/CVE-2026-73257","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73257","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73257","de":"https://www.redsauce.net/de/cves/CVE-2026-73257","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73257","el":"https://www.redsauce.net/el/cves/CVE-2026-73257"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73257"}}