{"id":"CVE-2026-97054","aliases":["GO-2026-6859"],"title":"HTTP/1 server crash due to MaxBytesReader header race in net/http","titleSource":"Go","descriptionSource":"OSV","description":"For HTTP/1 servers, when MaxBytesReader's limit is exceeded, \"Connection: close\" header is automatically set without synchronization, which might race with another header being set explicitly in the server handler. As a result, an HTTP/1 server that utilizes MaxBytesReader or MaxBytesHandler can crash due to runtime panic if its handler reads the request body concurrently with writing the response header.","severity":"unknown","score":null,"published":"2026-11-11T02:51:11.000Z","modified":"2026-11-11T03:15:14.805Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"stdlib","sources":[{"name":"OSV · GO-2026-6859","url":"https://osv.dev/vulnerability/GO-2026-6859"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.26.11"},{"introduced":"1.27.0-0"},{"fixed":"1.27.4"}],"type":"SEMVER"}],"versions":[],"fixed":["1.26.11","1.27.4"]}],"sourceAffected":[],"references":["https://go.dev/cl/862185","https://go.dev/issue/82563","https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM","https://pkg.go.dev/vuln/GO-2026-6859"],"sources":[{"name":"CVE","id":"CVE-2026-97054","modified":"2026-11-11T03:13:17.877Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-97054"},{"name":"OSV","id":"GO-2026-6859","modified":"2026-11-11T03:15:14.805898236Z","url":"https://osv.dev/vulnerability/GO-2026-6859"}],"assessments":[],"cve":{"records":[{"id":"CVE-2026-97054","source":"Go","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-23T23:05:04.988Z","published":"2026-11-11T03:13:17.877Z","modified":"2026-11-11T03:13:17.877Z"}],"publishers":[{"name":"Go","role":"CNA","organizationId":"1bb62c36-49e3-4200-9d77-64a1400537cc","modified":"2026-11-11T03:13:17.877Z"}],"references":[{"url":"https://go.dev/cl/862185","tags":[],"source":"Go"},{"url":"https://go.dev/issue/82563","tags":[],"source":"Go"},{"url":"https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM","tags":[],"source":"Go"},{"url":"https://pkg.go.dev/vuln/GO-2026-6859","tags":[],"source":"Go"}],"weaknesses":[],"applicability":[],"prioritization":[]},"products":[{"vendor":"Go standard library","name":"net/http","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"1.26.11","versionType":"semver"},{"version":"1.27.0-0","status":"affected","lessThan":"1.27.4","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Go","url":"https://www.cve.org/CVERecord?id=CVE-2026-97054"}],"remediation":[],"observedAt":"2026-11-11T06:55:53.286Z","kev":{"status":"not-listed","checkedAt":"2026-11-14T23:50:31.991Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-11T07:26:18.193Z","attemptedAt":"2026-11-11T07:26:18.193Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-11T07:25:39.452Z","attemptedAt":"2026-11-11T07:25:39.452Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-11T07:25:39.858Z","attemptedAt":"2026-11-11T07:25:39.858Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-11T07:25:41.652Z","attemptedAt":"2026-11-11T07:25:41.652Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-rg98-f588-44xg","url":"https://github.com/advisories/GHSA-rg98-f588-44xg","modified":"2026-11-11T06:32:48Z","checkedAt":"2026-11-11T07:25:39.452Z"},{"source":"ENISA EUVD","id":"EUVD-2026-123113","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-123113","modified":"Nov 11, 2026, 6:32:39 AM","checkedAt":"2026-11-11T07:25:39.858Z"},{"source":"NVD","id":"CVE-2026-97054","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97054","modified":"2026-11-11T05:19:58.943","checkedAt":"2026-11-11T07:26:18.193Z"}],"aiSummary":null}