Medium
tmate — security advisory
NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.
- Products
- tmate
- Affected versions
- 1.8.10-2, 1.8.10-2build1, 2.2.1-1build1, 2.2.1-1build3, 2.2.1-1build4, 2.3.0-1, 2.4.0-1, 2.4.0-2, 2.4.0-2build2, 2.4.0-2build3, 2.4.0-3, 2.4.0-3build1, 2.4.0-4
- Fixed versions
- Not specified
- CVEs
- CVE-2026-4751
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:06 UTC · Revision 1
Source evidence
NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.
osv:UBUNTU-CVE-2026-4751
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
tmate
Fixed versions: Not specified
Complete source record
{
"id": "11c6972245033d8e74f75261fcb171052e6e870efa1845a083269c96aee0c7e3",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-4751",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-4751",
"summary": "NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.",
"evidence": "osv:UBUNTU-CVE-2026-4751",
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{
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"evidence": "/affected/0/versions"
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"affected_versions": [
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"evidence": "/affected/2/versions"
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{
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},
{
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"prerequisites": [],
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"affected_versions": [
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"evidence": "/affected/7/versions"
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{
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"evidence": "/affected/7/versions"
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}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-4751",
"aliases": [
"UBUNTU-CVE-2026-4751"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/tmate?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.8.10-2",
"1.8.10-2build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"
},
"ecosystem_specific": {
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{
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"binary_version": "1.8.10-2build1"
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{
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"package": {
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"ecosystem": "Ubuntu:18.04:LTS"
},
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"database_specific": {
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"package": {
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},
"versions": [
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],
"database_specific": {
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},
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"package": {
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},
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],
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],
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],
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},
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],
"modified": "2026-10-17T13:00:17.626180786Z",
"provider": "osv",
"upstream": [
"CVE-2026-4751"
],
"references": [
"https://ubuntu.com/security/CVE-2026-4751",
"https://www.cve.org/CVERecord?id=CVE-2026-4751",
"https://github.com/tmate-io/tmate/pull/328"
]
},
"related_cves": [
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360424,
"published_at": "2026-03-24T06:16:00+00:00"
}