CVE-2026-54580

Description

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8.

Is your site exposed to CVE-2026-54580?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-354 CWE-354

CWE-755 CWE-755

References

Other References

https://github.com/MidnightBSD/mport/commit/b3e11ba078351402082a881209ee6fda5d332e3d https://github.com/MidnightBSD/mport/pull/135 https://github.com/MidnightBSD/mport/releases/tag/2.7.8 https://github.com/MidnightBSD/mport/security/advisories/GHSA-ffqj-j42r-747w

Frequently Asked Questions

What is CVE-2026-54580? +

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mport_decompress_zstd(), and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply compressed package index data that caused ZSTD_decompressStream() or an output write to fail while leaving partial index output available for later use, resulting in package-index integrity loss or denial of service. This issue is fixed in version 2.7.8.

How do I check if I'm vulnerable to CVE-2026-54580? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-48930

secp256k1-node is a Node.js binding for an Optimized C library for EC operations on curve secp256k1. In `elliptic`-based version, `loadUncompressedPublicKey` …

CVE-2026-54578

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 …

CVE-2025-11694

A security issue exists within 1769 CompactLogix controllers due to the missing validation of sequence numbers and source IP addresses …

CVE-2026-59642

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also …

CVE-2026-12803

In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery). …

CVE-2025-4616

An insufficient validation of an untrusted input vulnerability in Palo Alto Networks Prisma® Browser allows a locally authenticated non-admin user …