Low severity · published Sep 17, 2026
CVE-2026-54579
mport mirror-selection ping accepts insufficiently validated ICMP replies
2.3
CVSS
0.2%
EPSS
No
On KEV
Description
mport is the MidnightBSD Package Manager. Prior to 2.7.8, ping() in libmport/ping.c accepted ICMP replies without validating icmp_id or icmp_seq and parsed the reply using a fixed IP-header offset instead of ip_hl. A network attacker able to inject or spoof visible ICMP replies could influence mirror latency selection, while a malformed packet carrying IP options could shift the ICMP header and trigger an out-of-bounds read. This issue is fixed in version 2.7.8.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% 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-2026-54579
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54579
github.com
https://github.com/MidnightBSD/mport/security/advisories/GHSA-qc2f-2j7j-m3r7
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