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Vulnerability · Published Mar 26, 2026 · Assigned by Go

CVE-2026-32286Denial of service in github.com/jackc/pgproto3/v2

High 7.5

In plain English

A high-severity security flaw in github.com/jackc/pgproto3/v2 from github.com/jackc/pgproto3/v2. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 47.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC

Official description

The DataRow.Decode function fails to properly validate field lengths. A malicious or compromised PostgreSQL server can send a DataRow message with a negative field length, causing a slice bounds out of range panic.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12golang-github-jackc-pgproto3no fix listedDEBIAN-CVE-2026-32286
Debian:13golang-github-jackc-pgproto3no fix listedDEBIAN-CVE-2026-32286
Debian:14golang-github-jackc-pgproto32.3.3-2DEBIAN-CVE-2026-32286
Gogithub.com/jackc/pgproto3/v2no fix listedGHSA-jqcq-xjh3-6g23
Gogithub.com/jackc/pgproto3/v2no fix listedGO-2026-4518
Rocky Linux:10osbuild-composer0:165.1-2.el10_2.rocky.0.1RLSA-2026:22450
Rocky Linux:9osbuild-composer0:165.1-2.el9_8.rocky.0.1RLSA-2026:22714
Ubuntu:24.04:LTSgolang-github-jackc-pgproto3no fix listedUBUNTU-CVE-2026-32286
Ubuntu:25.10golang-github-jackc-pgproto3no fix listedUBUNTU-CVE-2026-32286
Ubuntu:26.04:LTSgolang-github-jackc-pgproto3no fix listedUBUNTU-CVE-2026-32286
Ubuntu:26.10golang-github-jackc-pgproto3no fix listedUBUNTU-CVE-2026-32286

Affected products (as reported)

VendorProductVersions
github.com/jackc/pgproto3/v2 github.com/jackc/pgproto3/v2 see references

Weakness: CWE-1285 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References