CVE-2026-54576

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Source
https://cve.org/CVERecord?id=CVE-2026-54576
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54576.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-54576
Aliases
  • GHSA-23g3-7fv3-3ccf
Published
2026-09-17T16:58:25Z
Modified
2026-09-18T03:47:31Z
Severity
  • 5.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
mport package installation has symlink TOCTOU in chown and chmod handling
Details

mport is the MidnightBSD Package Manager. Prior to 2.7.8, do_actual_install() in libmport/bundle_read_install_pkg.c used path-based lstat(), chown(), stat(), and chmod() operations while installing package files. A local attacker with write access to a target directory could replace a checked file with a symlink before privileged ownership or mode changes were applied, redirecting those changes to an attacker-selected path and compromising filesystem integrity or permissions. This issue is fixed in version 2.7.8.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-367",
        "CWE-59"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54576.json"
}
References

Affected packages

Git / github.com/midnightbsd/mport

Affected ranges

Type
GIT
Repo
https://github.com/midnightbsd/mport
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
899c8fe2d3ceb25d899e70dbd0c7744b7d7a0946
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.7.8"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

2.*
2.0
2.0.1
2.0.2
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9
2.1.0
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2.2.9.1
2.3.0
2.4.0
2.4.1
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.5.0
2.5.1
2.6.0
2.6.1
2.6.2
2.6.3
2.6.4
2.6.5
2.6.7
2.6.8
2.7.0
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54576.json"