CVE-2026-55601
MultiTail is a utility for monitoring multiple log files in one terminal
- Risk score
- 46/100
- CVSS
- 7.3 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- MultiTail is a utility for monitoring multiple log files in one terminal. In version 7.1.5 and earlier, the -ex and -eX execute-on-match feature appended attacker-controlled matched input to a configured command inside double quotes, then check_filter_exec() in mt.c passed the constructed command through execute_progr…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.3 high
References
- https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c
- https://github.com/folkertvanheusden/multitail/issues/56
- https://github.com/folkertvanheusden/multitail/security/advisories/GHSA-54vm-wwx8-856h
- https://github.com/folkertvanheusden/multitail/security/advisories/GHSA-54vm-wwx8-856h
Original description
MultiTail is a utility for monitoring multiple log files in one terminal. In version 7.1.5 and earlier, the -ex and -eX execute-on-match feature appended attacker-controlled matched input to a configured command inside double quotes, then check_filter_exec() in mt.c passed the constructed command through execute_program() in exec.c to sh -c. Partial escaping left shell metacharacters such as command substitution active, allowing an attacker who could influence monitored input to execute commands as the user running MultiTail. No fixed release is available as of this review.
Last activity 13 Oct 2026. Patch Forecast updates every hour.