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CVE-2026-103431— Collectl: collectl: colmux does not sanitize ansi/vt100 terminal escape sequences in data received from remote collectl instances

Quick assessment

Affected
CVE-2026-103431
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.

collectl 4.3.20.2 之前的版本中，colmux 组件在显示从远程 collectl 实例接收的数据时，未对 ANSI/VT100 终端转义序列进行清理。这使得被监控主机上的本地用户能够通过构造特定的进程名称（argv[0]），向正在运行 colmux 的操作员终端注入转义序列，从而可能执行恶意操作。

CVSS 7.7 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1562.008

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None < 4.3.20.3 affected

I. Basic Information for CVE-2026-103431

Vulnerability Information
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Vulnerability Title
Collectl: collectl: colmux does not sanitize ansi/vt100 terminal escape sequences in data received from remote collectl instances
Source: CVE Program / CVE List V5
Vulnerability Description
colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances before displaying it, allowing a local user on a monitored host to inject escape sequences into the terminal of an operator running colmux, via a crafted process name (argv[0]).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
转义、元或控制序列转义处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 4.3.20.3 -

II. Public POCs for CVE-2026-103431

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103431

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Vendor Advisories for CVE-2026-103431 (2)

IV. Related Vulnerabilities

Same weakness: CWE-150

V. Comments for CVE-2026-103431

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