Low severity · published Sep 17, 2026
CVE-2026-54578
mport verify can compare stale checksum data after hashing failures
2.0
CVSS
0.1%
EPSS
No
On KEV
Description
mport is the MidnightBSD Package Manager. Prior to 2.7.8, mport_verify_package() in libmport/verify.c could continue after MD5File() or SHA256_File() failed and compare an expected checksum with stale data in the hash buffer rather than a newly computed digest. An attacker able to influence an installed file or the conditions that make hashing fail could receive a misleading integrity result or hide a checksum failure. This issue is fixed in version 2.7.8.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MP
mport · MidnightBSD
< 2.7.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54578
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54578
github.com
https://github.com/MidnightBSD/mport/commit/cd9991c3cc1f60ecb3f378852ad8b5caa820e990
github.com
https://github.com/MidnightBSD/mport/pull/138
github.com
https://github.com/MidnightBSD/mport/releases/tag/2.7.8
github.com
https://github.com/MidnightBSD/mport/security/advisories/GHSA-hgmr-9p75-q5cg
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