PT-2026-27343 · Tmate · Tmate

Titan Team · Published 2026-03-24 · Updated 2026-03-24 · CVE-2026-4751

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions tmate versions prior to 2.4.0

Description A NULL pointer dereference issue exists in tmate. This can lead to unexpected behavior or crashes. The issue is present in tmate versions before 2.4.0.

Recommendations Update to version 2.4.0 or later.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-4751

Affected Products

Tmate

References · 8

• https://github.com/tmate-io/tmate/pull/328 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-4751 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-4751 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4751 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4751 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4751 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4751 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2036457302740328706 · Twitter Post