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CVE-2026-32148 Detail

Description

Insufficient Verification of Data Authenticity vulnerability in hexpm hex (Hex.RemoteConverger module) allows dependency integrity bypass via unverified lockfile checksums. Hex stores checksums for dependencies in the mix.lock file to ensure reproducible and integrity-checked builds. However, Hex.RemoteConverger.verify_resolved/2 never executes checksum verification because the lock data returned by Hex.Utils.lock/1 uses string-based dependency names, while the verification logic compares against atom-based names. This type mismatch causes the verification code path to be silently skipped. Checksums are still validated when packages are initially downloaded from the registry, but mismatches between the lockfile and resolved dependencies are not detected. An attacker who can influence cached packages (e.g., via local cache poisoning or a compromised registry) can provide modified dependency contents that will be accepted without detection. The mix.lock file is silently rewritten with the checksum values from the registry, erasing evidence of tampering. This issue affects hex: from 0.16.0 before 2.4.2.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  EEF
CVSS-B 8.9 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cna.erlef.org/cves/CVE-2026-32148.html EEF
https://github.com/hexpm/hex/commit/d7528c8199a1144511508bf3a6460026a5a14c8e EEF
https://github.com/hexpm/hex/security/advisories/GHSA-hmv9-4mfr-m92v CISA-ADP, EEF
https://osv.dev/vulnerability/EEF-CVE-2026-32148 EEF

Weakness Enumeration

CWE-ID CWE Name Source
CWE-354 Improper Validation of Integrity Check Value EEF  
CWE-494 Download of Code Without Integrity Check EEF  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-32148
NVD Published Date:
04/30/2026
NVD Last Modified:
04/30/2026
Source:
EEF