🛡️ CVE-2026-32148 — hex

🟡 CVSS 5.9 — Medium ⚠️ Exploit Public CWE-354 NVD
5.9
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2026-32148 is classified as CWE-354: Improper Validation of Integrity Check Value. A checksum or integrity value is not verified properly, so tampered data passes as intact.

Affected software

CVE-2026-32148 is recorded against 1 package.

  • hex (from 0.16.0 up to 2.4.2)

Timeline and source

Published on 30 April 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

cna.erlef.org
github.com
github.com
osv.dev
github.com

Details

Severity MEDIUM
CVSS Score 5.9
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-354
Public Exploit ⚠️ Yes
Source NVD
Published 2026-04-30
Updated 2026-08-11
Modified 2026-06-17

Affected Packages

Software From version Fixed in
hex 0.16.0 2.4.2

Similar Threats

Exploit Protection

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CVE-2026-32148 carries CVSS 5.9 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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