CVE-2026-103431 collectl - Stored XSS

collectl before 4.3.20.2 contains a stored XSS caused by unsanitized ANSI/VT100 escape sequences in data from remote instances, letting local users inject terminal escape sequences into operator's terminal, exploit requires local user on monitored host.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Client Script Exec
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-150

Vendor fix

Update to version 4.3.20.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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