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CVE-2026-4751— NULL Pointer Dereference in tmate-io tmate

Quick assessment

Affected
tmate-io tmate
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

tmate是tmate-io开源的一个即时终端共享工具。 tmate 2.4.0之前版本存在安全漏洞，该漏洞源于空指针取消引用。

CVSS 5.3 · Medium EPSS 0.31% · P24

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4751

Vulnerability Information
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Vulnerability Title
NULL Pointer Dereference in tmate-io tmate
Source: CVE Program / CVE List V5
Vulnerability Description
NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
tmate 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tmate是tmate-io开源的一个即时终端共享工具。 tmate 2.4.0之前版本存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tmate-io tmate 0 ~ 2.4.0 -

II. Public POCs for CVE-2026-4751

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-4751

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Patches & Fixes for CVE-2026-4751 (1)

IV. Related Vulnerabilities

Same weakness: CWE-476

V. Comments for CVE-2026-4751

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