CVE-2026-103431

Collectl: collectl: colmux does not sanitize ansi/vt100 terminal escape sequences in data received from remote collectl instances

7.7 High

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]).

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.18%Unchanged since Oct 2, 2026

What each source reports

CVE List Score used 7.7

Collectl: collectl: colmux does not sanitize ansi/vt100 terminal escape sequences in data received from remote collectl instances

Record: CVE-2026-103431
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-150
Updated: 2026-11-02

EUVDEUVD-2026-90576 7.7

Record: EUVD-2026-90576
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-ggwj-h7wp-pg4f 7.7

colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data...

Record: GHSA-ggwj-h7wp-pg4f
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-150
Updated: 2026-11-02

NVD 7.7

Record: CVE-2026-103431
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-150
Updated: 2026-11-02

OSV 7.7

Collectl: collectl: colmux does not sanitize ansi/vt100 terminal escape sequences in data received from remote collectl instances

Record: CVE-2026-103431
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Weakness: CWE-150
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-103431 7.7

Record: DEBIAN-CVE-2026-103431
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-103431 7.7

Record: UBUNTU-CVE-2026-103431
CVSS 3.1: 7.7 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Updated: 2026-11-02

Affected packages

Affected packages
Package	Affected	Fixed
`collectl` Debian:12	All versions, plus listed versions 4.3.1-14.3.20.1-14.3.20.1-24.3.20.2-14.3.6-2	None known
`collectl` Debian:13	All versions, plus listed versions 4.3.1-14.3.20.1-14.3.20.1-24.3.20.2-14.3.6-2	None known
`collectl` Debian:14	All versions, plus listed versions 4.3.1-14.3.20.1-14.3.20.1-24.3.20.2-14.3.6-2	None known
`collectl` Ubuntu:14.04:LTS	All versions, plus listed versions 3.6.7-13.6.9-1	None known
`collectl` Ubuntu:16.04:LTS	All versions, plus listed versions 4.0.0-24.0.4-1	None known
`collectl` Ubuntu:18.04:LTS	All versions, plus listed versions 4.0.5-1	None known
`collectl` Ubuntu:20.04:LTS	All versions, plus listed versions 4.3.1-1	None known
`collectl` Ubuntu:22.04:LTS	All versions, plus listed versions 4.3.1-1	None known
`collectl` Ubuntu:24.04:LTS	All versions, plus listed versions 4.3.1-1	None known
`collectl` Ubuntu:26.10	All versions, plus listed versions 4.3.20.1-24.3.20.2-1	None known
`collectl` Ubuntu:26.04:LTS	All versions, plus listed versions 4.3.1-14.3.20.1-14.3.20.1-2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-103431 is a high vulnerability (CVSS 7.7) in collectl, published October 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 7th percentile. No source names a fixed version.