CVE-2026-32148 (GCVE-0-2026-32148)

Vulnerability from cvelistv5 – Published: 2026-04-30 18:17 – Updated: 2026-05-01 04:33
VLAI?
Title
Lockfile checksums not verified in Hex allows dependency integrity bypass
Summary
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.
CWE
  • CWE-354 - Improper Validation of Integrity Check Value
  • CWE-494 - Download of Code Without Integrity Check
Assigner
EEF
Impacted products
Vendor Product Version
hexpm hex Affected: 0.16.0 , < 2.4.2 (semver)
    cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
Create a notification for this product.
    hexpm hex Affected: e01576f28c64af9fae6eb17e2dad30f6efcb303c , < d7528c8199a1144511508bf3a6460026a5a14c8e (git)
    cpe:2.3:a:hexpm:hex:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Paul Fleischer Jonatan Männchen / EEF Eric Meadows-Jönsson / Hex.pm
Show details on NVD website

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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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