CVE-2026-33816: Memory-safety vulnerability in github.com/jackc/pgx/v5.

Q: How do I fix CVE-2026-33816?

pgx: upgrade to 5.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33816 being exploited?

CVE-2026-33816 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33816 affect?

CVE-2026-33816 affects pgx. Severity is critical (CVSS 9.8). Memory-safety vulnerability in github.com/jackc/pgx/v5.

Q: How urgent is CVE-2026-33816?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-33816 is a critical-severity flaw (CVSS 9.8) affecting pgx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Memory-safety vulnerability in github.com/jackc/pgx/v5.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-07
Last modified	2026-10-26

Publisher (CNA): Go Project · Vendor: jackc

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

Am I affected?

Timeline

2026-04-07 16:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

jackc pgx UPGRADE

Affected: < 5.9.0

Fixed in: 5.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.9.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pgx

Note

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

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-2026-33816?

pgx: upgrade to 5.9.0. Exact commands for each OS are on this page.

Is CVE-2026-33816 being exploited?

CVE-2026-33816 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-2026-33816 affect?

CVE-2026-33816 affects pgx. Severity is critical (CVSS 9.8). Memory-safety vulnerability in github.com/jackc/pgx/v5.

How urgent is CVE-2026-33816?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-33815 CRITICAL 9.8 MITIGATE Memory-safety vulnerability in github.com/jackc/pgx/v5.
CVE-2026-41889 CRITICAL 9.8 UPGRADE pgx is a PostgreSQL driver and toolkit for Go

References

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