What is CVE-2026-4751?

CVE-2026-4751 is a medium-severity vulnerability in Tmate-io Tmate, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-03-24.

How severe is CVE-2026-4751?

Medium severity. CVSS v3 base score is 5.3 out of 10.

NULL pointer dereference in Tmate-io Tmate

CVE-2026-4751

NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.

EPSS: 0.001 (18.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Tmate-io Tmate — versions 0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/tmate-io/tmate/pull/328 (patch)

Frequently asked questions

What is CVE-2026-4751?: CVE-2026-4751 is a medium-severity vulnerability in Tmate-io Tmate, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-03-24.
How severe is CVE-2026-4751?: Medium severity. CVSS v3 base score is 5.3 out of 10.