CVE-2026-54576
mport package installation has symlink TOCTOU in chown and chmod handling
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-59 CWE-367 |
| Vendor | midnightbsd |
| Product | mport |
| Published | Sep 17, 2026 |
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Affected Versions
MidnightBSD / mport
< 2.7.8
References
github.com: https://github.com/MidnightBSD/mport/security/advisories/GHSA-23g3-7fv3-3ccf github.com: https://github.com/MidnightBSD/mport/pull/150 github.com: https://github.com/MidnightBSD/mport/commit/4676ac05b1056b54a3d38d03ae8a478bf12c9abe github.com: https://github.com/MidnightBSD/mport/releases/tag/2.7.8