CVE-2026-32148: Insufficient Verification of Data Authenticity vulnerability in hexpm hex (Hex.RemoteConverger module) allows

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MEDIUM 5.9REMOTEUPGRADE

CVE-2026-32148 is a medium-severity flaw (CVSS 5.9) affecting hex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-354, CWE-494
Published	2026-04-30
Last modified	2026-10-26

Publisher (CNA): EEF · Vendor: hex

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-30 19:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

hex hex UPGRADE

Affected: >= 0.16.0 and < 2.4.2

Fixed in: 2.4.2

Safe to downgrade to: a release before 0.16.0

1. Check installed version

apt-cache policy hex || rpm -q hex || hex --version

2. UPGRADE to 2.4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hex

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hex

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.16.0 (Debian / Ubuntu)

apt-cache madison hex sudo apt install hex=<VERSION_BEFORE_0.16.0> sudo apt-mark hold hex

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hex sudo dnf downgrade hex-<VERSION_BEFORE_0.16.0> sudo dnf versionlock add hex

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32148?

hex: upgrade to 2.4.2. Exact commands for each OS are on this page.

Is CVE-2026-32148 being exploited?

CVE-2026-32148 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32148 affect?

CVE-2026-32148 affects hex. Severity is medium (CVSS 5.9). 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 ensu

How urgent is CVE-2026-32148?

Priority 33/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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