CVE-2026-48772: ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL

This week

CRITICAL 10.0REMOTEWATCHLISTUPGRADE

CVE-2026-48772 is a critical-severity flaw (CVSS 10.0) affecting proxysql. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 2.0.0 through 3.0.8, the ProxySQL MySQL frontend accepts the `PROXY UNKNOWN <addr> <addr> <port> <port>\r\n` PP1 frame as a well-formed PROXY protocol header. The HAProxy PROXY protocol v1 specification says that when the protocol token is `UNKNOWN`, the receiver MUST ignore any address fields that follow it, because the proxy has declared it cannot determine the clie

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-348, CWE-863
Published	2026-06-19
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: proxysql

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-19 20:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

proxysql proxysql UPGRADE

Affected: >= 2.0.0 and < 3.0.9

Fixed in: 3.0.9

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to 3.0.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade proxysql

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 2.0.0 (Debian / Ubuntu)

apt-cache madison proxysql sudo apt install proxysql=<VERSION_BEFORE_2.0.0> sudo apt-mark hold proxysql

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

dnf --showduplicates list proxysql sudo dnf downgrade proxysql-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add proxysql

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-2026-48772?

proxysql: upgrade to 3.0.9. Exact commands for each OS are on this page.

Is CVE-2026-48772 being exploited?

CVE-2026-48772 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-2026-48772 affect?

CVE-2026-48772 affects proxysql. Severity is critical (CVSS 10.0). ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL. In versions 2.0.0 through 3.0.8, the ProxySQL MySQL frontend accepts the `PROXY UNKNOWN <addr> <addr> <port> <port>\r\n` PP1 frame as a well-formed PROXY protocol header. T

How urgent is CVE-2026-48772?

Priority 53/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

MySQL vulnerabilities · PostgreSQL vulnerabilities · HAProxy vulnerabilities

Related CVEs

CVE-2026-48773 CRITICAL 9.8 UPGRADE ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL
CVE-2026-48774 HIGH 7.5 UPGRADE ProxySQL is a proxy for MySQL and its forks, as well as PostgreSQL

References

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