{"id":"CVE-2026-4751","summary":"NULL Pointer Dereference in tmate-io tmate","details":"NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.","modified":"2026-10-28T10:55:32.599874022Z","published":"2026-03-24T05:37:44.416Z","database_specific":{"cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4751.json","cna_assigner":"GovTech CSG"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4751.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4751"},{"type":"FIX","url":"https://github.com/tmate-io/tmate/pull/328"},{"type":"PACKAGE","url":"https://github.com/tmate-io/tmate"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tmate-io/tmate","events":[{"introduced":"0"},{"fixed":"5e00bfa5e137e76c81888727712ced2b3fd99f5b"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"fixed":"2.4.0"}],"source":"AFFECTED_FIELD"},{"source":"DESCRIPTION","range":[{"introduced":"0"},{"fixed":"2.4.0"}]}]}}],"versions":["2.3.1","2.3.0","2.2.1","2.2.0","1.8.10","1.8.9a","1.8.9","1.8.8","1.8.7","1.8.6","1.8.5","1.8.4","1.8.3","base","1.8","to_copy"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4751.json","vanir_signatures":[{"id":"CVE-2026-4751-3f3c34ab","signature_type":"Line","signature_version":"v1","source":"https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b","target":{"file":"tmate-session.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["327883460227041003938581001454226052239","137206339826380335687601049620789308544","102748940356720934504101352933406201149","125427680454422080786647168918705589552","102894536565226798908138128821872290776","29180683381143016413189312719960988320","85601148945432896720467462702975324428"]}},{"target":{"file":"tmate-session.c","function":"tmate_session_start"},"deprecated":false,"digest":{"function_hash":"300485992612120466588770494544055851682","length":551},"id":"CVE-2026-4751-f36163cd","signature_type":"Function","signature_version":"v1","source":"https://github.com/tmate-io/tmate/commit/5e00bfa5e137e76c81888727712ced2b3fd99f5b"}],"vanir_signatures_modified":"2026-10-28T10:55:32Z"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}