CVE-2026-46718: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Cal

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MEDIUM 6.5REMOTEWATCHLISTUPGRADE

CVE-2026-46718 is a medium-severity flaw (CVSS 6.5) affecting calcite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite. This issue affects Apache Calcite: from 1.5.0 before 1.42. Users are recommended to upgrade to version 1.42, which fixes the issue.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-470
Published	2026-06-02
Last modified	2026-07-22

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

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 10:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

apache calcite UPGRADE

Affected: >= 1.5.0 and < 1.42.0

Fixed in: 1.42.0

Safe to downgrade to: a release before 1.5.0

1. Check installed version

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

2. UPGRADE to 1.42.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade calcite

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 1.5.0 (Debian / Ubuntu)

apt-cache madison calcite sudo apt install calcite=<VERSION_BEFORE_1.5.0> sudo apt-mark hold calcite

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

dnf --showduplicates list calcite sudo dnf downgrade calcite-<VERSION_BEFORE_1.5.0> sudo dnf versionlock add calcite

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-2026-46718?

calcite: upgrade to 1.42.0. Exact commands for each OS are on this page.

Is CVE-2026-46718 being exploited?

CVE-2026-46718 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-2026-46718 affect?

CVE-2026-46718 affects calcite. Severity is medium (CVSS 6.5). Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite. This issue affects Apache Calcite: from 1.5.0 before 1.42. Users are recommended to upgrade to version 1.42, which fixes t

How urgent is CVE-2026-46718?

Priority 42/100. Remotely exploitable, no login, no user action; On your watchlist

References

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