{"id":"CVE-2026-39836","summary":"Panic in Dial and LookupPort when handling NUL byte on Windows in net","details":"The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).","aliases":["BIT-golang-2026-39836","GO-2026-4971"],"modified":"2026-05-19T18:29:12.315868599Z","published":"2026-05-07T19:41:18.300Z","related":["CGA-g4vf-wmcj-mwwf","SUSE-SU-2026:1861-1","SUSE-SU-2026:1862-1","openSUSE-SU-2026:10723-1","openSUSE-SU-2026:10741-1","openSUSE-SU-2026:20762-1","openSUSE-SU-2026:20763-1"],"database_specific":{"cna_assigner":"Go","unresolved_ranges":[{"extracted_events":[{"fixed":"1.25.10"},{"introduced":"1.26.0-0"},{"fixed":"1.26.3"}],"source":"AFFECTED_FIELD"}],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39836.json"},"references":[{"type":"WEB","url":"https://go.dev/cl/775320"},{"type":"WEB","url":"https://go.dev/issue/79006"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/qcCIEXso47M"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-4971"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39836.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39836"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/golang/go","events":[{"introduced":"0"},{"fixed":"5053df5b6ff006dfc96df442fddddee49f5250eb"},{"introduced":"d90b98e65320778f3b1f99a6951ab20f04d218b3"},{"fixed":"2dc996f71b0ebafb77e64433e58333e049488a3c"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.25.10"},{"introduced":"1.26.0"},{"fixed":"1.26.3"}],"cpe":"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*","source":"CPE_FIELD"}}],"versions":["go1.25.9","go1.26.2","go1.26.1","go1.25.8","go1.25.7","go1.26.0","go1.25.6","go1.25.5","go1.25.4","go1.25.3","go1.25.2","go1.25.1","go1.25.0","go1.25rc3","go1.25rc2","go1.25rc1","go1.19beta1","go1.18beta2","go1.18beta1","go1.17beta1","go1.16beta1","go1.15beta1","go1.14beta1","go1.13beta1","go1.12beta2","go1.12beta1","go1.11beta3","go1.11beta2","go1.11beta1","go1.10rc2","go1.10rc1","go1.10beta2","go1.10beta1","go1.9beta2","go1.9beta1","go1.8beta2","go1.8beta1","go1.7rc4","go1.7rc3","go1.7rc2","go1.7rc1","go1.7beta2","go1.7beta1","go1.6beta2","go1.6beta1","go1.5beta3","go1.5beta2","go1.5beta1","go1.4beta1","go1.3beta2","go1.3beta1","weekly.2012-03-27","weekly","weekly.2012-03-22","weekly.2012-03-13","weekly.2012-03-04","weekly.2012-02-22","weekly.2012-02-14","weekly.2012-02-07","weekly.2012-01-27","weekly.2012-01-20","weekly.2012-01-15","weekly.2011-12-22","weekly.2011-12-14","weekly.2011-12-06","weekly.2011-12-02","weekly.2011-12-01","weekly.2011-11-18","weekly.2011-11-09","weekly.2011-11-08","weekly.2011-11-02","weekly.2011-11-01","weekly.2011-10-26","weekly.2011-10-25","weekly.2011-10-18","weekly.2011-10-06","weekly.2011-09-21","weekly.2011-09-16","weekly.2011-08-17","weekly.2011-09-07","weekly.2011-09-01","weekly.2011-08-10","weekly.2011-07-07","weekly.2011-07-29","weekly.2011-07-19","weekly.2011-06-09","weekly.2011-06-23","weekly.2011-06-16","weekly.2011-06-02","weekly.2011-05-22","weekly.2011-04-27","weekly.2011-04-13","weekly.2011-04-04","weekly.2011-03-28","weekly.2011-03-15","weekly.2011-03-07.1","release.r56","weekly.2011-03-07","weekly.2011-02-24","weekly.2011-02-15","weekly.2011-02-01.1","weekly.2011-02-01","weekly.2011-01-20","weekly.2011-01-19","weekly.2011-01-12","weekly.2011-01-06","weekly.2010-12-22","weekly.2010-12-15.1","weekly.2010-12-15","weekly.2010-12-08","weekly.2010-12-02","weekly.2010-11-23","weekly.2010-11-10","weekly.2010-11-02","weekly.2010-10-27","weekly.2010-10-20","weekly.2010-10-13.1","weekly.2010-10-13","weekly.2010-09-29","weekly.2010-09-22","weekly.2010-09-15","weekly.2010-09-06","weekly.2010-08-25","weekly.2010-08-11","weekly.2010-08-04","weekly.2010-07-29","weekly.2010-07-14","weekly.2010-07-01","weekly.2010-06-21","weekly.2010-06-09","weekly.2010-05-27","weekly.2010-05-04","weekly.2010-04-27","weekly.2010-04-13","weekly.2010-03-30","weekly.2010-03-22","weekly.2010-03-15","weekly.2010-03-04","weekly.2010-02-23","weekly.2010-02-17","weekly.2010-02-04","weekly.2010-01-27","weekly.2010-01-13","weekly.2010-01-05","weekly.2009-12-22","weekly.2009-12-09","weekly.2009-12-07","weekly.2009-11-17","weekly.2009-11-12","weekly.2009-11-10.1","weekly.2009-11-10","weekly.2009-11-06"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-39836.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}