RCE in Tclahr Uac
CVE-2026-41450
UAC (Unix-like Artifacts Collector) versions prior to 3.3.0 contain a command injection vulnerability in the _command_collector function where foreach command output lines are substituted directly into command strings via sed without proper escaping before being evaluated with eval. Attackers can exploit this by crafting malicious filenames or artifact definitions containing shell metacharacters such as command substitution syntax or semicolons to execute arbitrary commands on the analyst's host system.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (65.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.011 · change: +0.004
Affected products
Weakness classification (CWE)
References
- github.com/tclahr/uac/pull/443 (issue-tracking)
- github.com/tclahr/uac/commit/2cc367d8ead388f05abd3cfb8af537788a124e72 (patch)
- www.vulncheck.com/advisories/uac-command-injection-via-command-collector-sh (third-party-advisory)
Frequently asked questions
- What is CVE-2026-41450?
- CVE-2026-41450 is a high-severity vulnerability in Tclahr Uac, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-08-21.
- How severe is CVE-2026-41450?
- High severity. CVSS v3 base score is 7.8 out of 10.