CVE-2026-103431 colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances be
A local user can inject terminal escape sequences via process names, potentially manipulating the display of the colmux operator.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-103431?
CVE-2026-103431 is a high-severity vulnerability, published on 1 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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]).
Weakness: CWE-150
Which versions are affected by CVE-2026-103431?
How do I fix CVE-2026-103431?
No fix has been published for CVE-2026-103431 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103431 being exploited?
There is no known exploitation of CVE-2026-103431 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-103431, GHSA-ggwj-h7wp-pg4f, UBUNTU-CVE-2026-103431.