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CVE-2026-55601

7.3 · HIGH

MultiTail is a utility for monitoring multiple log files in one terminal.

Published Oct 13, 2026CWE-78EPSS 0.21%

Overview

CVE-2026-55601 is a high-severity vulnerability. It was published on October 13, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153cGitHubgithub.com/folkertvanheusden/multitail/issues/56GitHubgithub.com/folkertvanheusden/multitail/security/advisories/GHSA-54vm-wwx8-856hGitHubgithub.com/folkertvanheusden/multitail/security/advisories/GHSA-54vm-wwx8-856h

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55601?

CVE-2026-55601 is a high-severity vulnerability. It was published on October 13, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-55601?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-55601?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55601?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55601 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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