{"action":"Upgrade stdlib to 1.26.1 or later.","affected":[{"fixed":"1.26.1","introduced":"1.26.0-0"}],"component":"stdlib","cve_ids":["CVE-2026-27138"],"ecosystem":"Go","epss":0.00364,"exploited":false,"fixed_versions":["1.26.1"],"id":"tcs_01M5KGESACXWFGPRPN6S9G2006","modified_at":"2026-05-15T10:59:23.758905709Z","published_at":"2026-03-06T21:03:42Z","references":["https://osv.dev/vulnerability/GO-2026-4600","https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk","https://go.dev/issue/77953","https://go.dev/cl/752183"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GO-2026-4600","url":"https://osv.dev/vulnerability/GO-2026-4600"},{"source":"nvd","source_id":"CVE-2026-27138","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27138"}],"summary":"Panic in name constraint checking for malformed certificates in crypto/x509"}