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CVE-2026-4751

NULL Pointer Dereference in tmate-io tmate

5.3 MediumFix available

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.33%Up 0.3 points since Mar 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

NULL Pointer Dereference in tmate-io tmate

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

Record
CVE-2026-4751
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2026-14768 5.3

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

Record
EUVD-2026-14768
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
GitHub AdvisoriesGHSA-9g3x-ch5w-33ch 5.3

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

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

Record
GHSA-9g3x-ch5w-33ch
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-476
Updated
2026-11-02
NVD 5.3

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

Record
CVE-2026-4751
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-476
Updated
2026-11-02
OSV 5.3

NULL Pointer Dereference in tmate-io tmate

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

Record
CVE-2026-4751
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-476
Updated
2026-11-02
OSVDEBIAN-CVE-2026-4751 5.3

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

Record
DEBIAN-CVE-2026-4751
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-05
OSVUBUNTU-CVE-2026-4751 5.3

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

Record
UBUNTU-CVE-2026-4751
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tmate
Debian:12
 All versions, plus listed versions
2.4.0-22.4.0-32.4.0-42.4.0-4.1
 None known
tmate
Debian:13
 All versions, plus listed versions
2.4.0-32.4.0-42.4.0-4.1
 None known
tmate
Debian:14
 before 2.4.0-4.1, plus listed versions
2.4.0-32.4.0-4
2.4.0-4.1
tmate
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.8.10-21.8.10-2build1
 None known
tmate
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.2.1-1build1
 None known
tmate
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.2.1-1build32.2.1-1build42.3.0-12.4.0-1
 None known
tmate
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.4.0-2
 None known
tmate
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.4.0-2build22.4.0-2build3
 None known
tmate
Ubuntu:25.10
 All versions, plus listed versions
2.4.0-3
 None known
tmate
Ubuntu:26.10
 All versions, plus listed versions
2.4.0-3build12.4.0-4
 None known
tmate
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.4.0-32.4.0-3build1
 None known

History

History
RecordedChangedSources
affected, factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-4751 is a medium vulnerability (CVSS 5.3) in Tmate-io Tmate, published March 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. Fixed in tmate 2.4.0-4.1.

References

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