CVE-2026-55601

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Source
https://cve.org/CVERecord?id=CVE-2026-55601
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55601.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55601
Aliases
  • GHSA-54vm-wwx8-856h
Published
2026-10-13T19:13:31Z
Modified
2026-10-15T07:06:23Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
MultiTail: Shell injection in execute-on-match command handling
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-78"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55601.json"
}
References

Affected packages

Git / github.com/folkertvanheusden/multitail

Affected ranges

Type
GIT
Repo
https://github.com/folkertvanheusden/multitail
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
84f304e140261034e33796bab81e9bf4f09d153c
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "last_affected":  "7.1.5"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

6.*
6.3
6.5
7.*
7.0.0
7.1.0
7.1.1
7.1.2
7.1.3
7.1.4
7.1.4a
7.1.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55601.json"
vanir_signatures 
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        "deprecated":  false,
        "digest":  {
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            "length":  828
        },
        "id":  "CVE-2026-55601-1bd492ab",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c",
        "target":  {
            "file":  "exec.c",
            "function":  "execute_program"
        }
    },
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        "deprecated":  false,
        "digest":  {
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            "length":  637
        },
        "id":  "CVE-2026-55601-23ea7173",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c",
        "target":  {
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            "function":  "check_filter_exec"
        }
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            "threshold":  0.9
        },
        "id":  "CVE-2026-55601-3802b7b3",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c",
        "target":  {
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        "source":  "https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c",
        "target":  {
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            "threshold":  0.9
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        "id":  "CVE-2026-55601-721643ff",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/folkertvanheusden/multitail/commit/84f304e140261034e33796bab81e9bf4f09d153c",
        "target":  {
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    }
]
vanir_signatures_modified 
"2026-10-15T07:06:23Z"