{"id":"GO-2026-4978","aliases":["BIT-golang-2026-39819","CVE-2026-39819"],"title":"Invoking \"go bug\" follows symlinks in predictable temporary filenames in cmd/go","titleSource":"OSV","descriptionSource":"OSV","description":"The \"go bug\" command writes to two files with predictable names in the system temporary directory (for example, \"/tmp\").\n\nAn attacker with access to the temporary directory can create a symlink in one of these names, causing \"go bug\" to overwrite the target of the symlink.","severity":"unknown","score":null,"published":"2026-05-07T19:21:40.000Z","modified":"2026-11-14T13:12:13.681Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Go","name":"toolchain","sources":[{"name":"OSV · GO-2026-4978","url":"https://osv.dev/vulnerability/GO-2026-4978"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}],"type":"SEMVER"}],"versions":[],"fixed":["1.25.10","1.26.3"]}],"sourceAffected":[],"references":["https://go.dev/issue/78584","https://go.dev/cl/763882","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"sources":[{"name":"OSV","id":"GO-2026-4978","modified":"2026-11-14T13:12:13.681008176Z","url":"https://osv.dev/vulnerability/GO-2026-4978"}],"assessments":[],"products":[],"remediation":[],"observedAt":"2026-11-14T15:23:20.529Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:15:34.962Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-14T16:15:34.399Z","attemptedAt":"2026-11-14T16:15:34.399Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-14T16:10:34.890Z","attemptedAt":"2026-11-14T16:10:34.890Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-14T16:10:36.555Z","attemptedAt":"2026-11-14T16:10:36.555Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-14T16:10:34.497Z","attemptedAt":"2026-11-14T16:10:34.497Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-39819","url":"https://www.first.org/epss/","probability":0.00179,"percentile":0.07568,"date":"2026-11-14","checkedAt":"2026-11-14T16:10:34.497Z"},{"source":"GitHub Advisory Database","id":"GHSA-5m4p-2gjx-p2g8","url":"https://github.com/advisories/GHSA-5m4p-2gjx-p2g8","modified":"2026-11-12T00:32:51Z","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","checkedAt":"2026-11-14T16:10:34.890Z"},{"source":"ENISA EUVD","id":"EUVD-2026-28422","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28422","modified":"May 8, 2026, 9:29:53 PM","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","checkedAt":"2026-11-14T16:10:36.555Z"},{"source":"NVD","id":"CVE-2026-39819","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39819","modified":"2026-11-11T23:10:00.263","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","checkedAt":"2026-11-14T16:15:34.399Z"},{"source":"NVD","id":"CVE-2026-39819","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39819","modified":"2026-11-11T23:10:00.263","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","checkedAt":"2026-11-14T16:15:34.399Z"}],"aiSummary":null}