CVE-2026-73334: Potential problem for users of the org.apache.parquet.crypto.keytools package in Apache Parquet, versions 1.12

This month

HIGH 8.1WATCHLISTUPGRADE

CVE-2026-73334 is a high-severity flaw (CVSS 8.1) affecting parquet. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Potential problem for users of the org.apache.parquet.crypto.keytools package in Apache Parquet, versions 1.12 to 1.18. This package enables users to encrypt Parquet files via an envelope encryption mechanism that wraps (encrypts) data keys via a Key Management Service (KMS). On the reader side, the KMS URL can be application-controlled or file-controlled. If the user does not leverage application control for this parameter, a file-controlled K

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-09-09
Last modified	2026-09-10

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-09-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-09 11:17 UTCPublished CVE record published
2026-09-10 20:36 UTCUpdated Record last modified

apache parquet UPGRADE

Affected: >= 1.12.2 and <= 1.18.0

Fixed in: newer than 1.18.0

Safe to downgrade to: a release before 1.12.2

1. Check installed version

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

2. UPGRADE to newer than 1.18.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade parquet

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 1.12.2 (Debian / Ubuntu)

apt-cache madison parquet sudo apt install parquet=<VERSION_BEFORE_1.12.2> sudo apt-mark hold parquet

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

dnf --showduplicates list parquet sudo dnf downgrade parquet-<VERSION_BEFORE_1.12.2> sudo dnf versionlock add parquet

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-2026-73334?

parquet: upgrade to newer than 1.18.0. Exact commands for each OS are on this page.

Is CVE-2026-73334 being exploited?

CVE-2026-73334 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-2026-73334 affect?

CVE-2026-73334 affects parquet. Severity is high (CVSS 8.1). Potential problem for users of the org.apache.parquet.crypto.keytools package in Apache Parquet, versions 1.12 to 1.18. This package enables users to encrypt Parquet files via an envelope encryption mechanism that wraps (encrypts) data key

How urgent is CVE-2026-73334?

Priority 41/100. High severity; On your watchlist

References

← Back to latest CVEs