What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-01 · updated 2026-10-01
• Weakness: CWE-150

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]).

Affected products

• collectl: before 4.3.20.3 — fixed in 4.3.20.3

How to fix

Upgrade to a fixed version: collectl 4.3.20.3. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2026-103431
• https://bugzilla.redhat.com/show_bug.cgi?id=2543974

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