{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-58186", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2025-08-27T14:50:58.691Z", "datePublished": "2025-10-29T22:10:13.912Z", "dateUpdated": "2025-10-29T22:10:13.912Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2025-10-29T22:10:13.912Z"}, "title": "Lack of limit when parsing cookies can cause memory exhaustion in net/http", "descriptions": [{"lang": "en", "value": "Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as \"a=;\", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption."}], "affected": [{"vendor": "Go standard library", "product": "net/http", "collectionURL": "https://pkg.go.dev", "packageName": "net/http", "versions": [{"version": "0", "lessThan": "1.24.8", "status": "affected", "versionType": "semver"}, {"version": "1.25.0", "lessThan": "1.25.2", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "ParseCookie"}, {"name": "readSetCookies"}, {"name": "readCookies"}, {"name": "Client.Do"}, {"name": "Client.Get"}, {"name": "Client.Head"}, {"name": "Client.Post"}, {"name": "Client.PostForm"}, {"name": "Get"}, {"name": "Head"}, {"name": "Post"}, {"name": "PostForm"}, {"name": "Request.Cookie"}, {"name": "Request.Cookies"}, {"name": "Request.CookiesNamed"}, {"name": "Response.Cookies"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption"}]}], "references": [{"url": "https://go.dev/issue/75672"}, {"url": "https://go.dev/cl/709855"}, {"url": "https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI"}, {"url": "https://pkg.go.dev/vuln/GO-2025-4012"}], "credits": [{"lang": "en", "value": "jub0bs"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as \"a=;\", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption."}], "id": "CVE-2025-58186", "lastModified": "2025-10-29T23:16:19.547", "metrics": {}, "published": "2025-10-29T23:16:19.547", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/709855"}, {"source": "security@golang.org", "url": "https://go.dev/issue/75672"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2025-4012"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Received"}

{}

{}