{"apiVersion":"1.0","identifier":"CVE-2026-79658","description":"Ech0 before 5.0.1 does not impose any size or shape limit on the Accept-Language header processed by its i18n middleware, which runs on every HTTP request. The header is passed unfiltered to go-i18n-s NewLocalizer, which internally calls golang.org/x/text/language.ParseAcceptLanguage. The CVE-2022-32149 mitigation in x/text caps --- characters but not -_- characters, which the parser aliases to ---, allowing quadratic-time parsing to be triggered with a large header (up to Go-s default 1 MiB) built from underscore separators. An unauthenticated attacker can send such requests to consume roughly 1.5 seconds of CPU each, and concurrent requests can saturate a multi-core server (denial of service).","publishedAt":"2026-08-25T12:16:29","lastModifiedAt":"2026-08-26T17:17:23","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-79658","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","epssProbability":0.00291,"riskScore":0.77,"affectedProduct":"Ech0","affectedVersions":"<5.0.1","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-79658","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-79658","en":"https://www.redsauce.net/en/cves/CVE-2026-79658","fr":"https://www.redsauce.net/fr/cves/CVE-2026-79658","pt":"https://www.redsauce.net/pt/cves/CVE-2026-79658","de":"https://www.redsauce.net/de/cves/CVE-2026-79658","sk":"https://www.redsauce.net/sk/cves/CVE-2026-79658","el":"https://www.redsauce.net/el/cves/CVE-2026-79658"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-79658"}}