CVE-2026-32286 — pgproto3
HIGHCVE-2026-32286 is a high-severity (CVSS 7.5) CWE-129 vulnerability in github.com/jackc/pgproto3/v2. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.
Denial of service in github.com/jackc/pgproto3/v2
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-32286.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/jackc/pgproto3/v2Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
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
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/jackc/pgproto3/v2 | ≥ 2.0.0 | No fix |
Affected Products
pgproto3jackcDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/jackc/pgproto3/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of github.com/jackc/pgproto3/v2 for CVE-2026-32286. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
The PostgreSQL server multicluster-globalhub-manager connects to is either provisioned by the operator itself or specified by the admin managing the deployment. To successfully exploit the vulnerability in this context the attacker would need to compromise the operator-deployed PostgreSQL server to force a crafted…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for CVE-2026-32286 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Enterprise Linux 10 | osbuild-composer-0:165.1-2.el10_2 | RHSA-2026:22450 |
| Red Hat Enterprise Linux 9 | osbuild-composer-0:165.1-2.el9_8 | RHSA-2026:22714 |
| Multicluster Global Hub 1.3.4 | multicluster-globalhub/multicluster-globalhub-agent-rhel9:1779210675 | RHSA-2026:22423 |
| Multicluster Global Hub 1.4.9 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779579439 | RHSA-2026:22347 |
| Multicluster Global Hub 1.5.8 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1778867753 | RHSA-2026:21769 |
| Multicluster Global Hub 1.6.6 | multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1780167118 | RHSA-2026:23345 |
| Red Hat Advanced Cluster Security 4.8 | advanced-cluster-security/rhacs-main-rhel8:1777307791 | RHSA-2026:11070 |
| Red Hat Advanced Cluster Security 4.8 | advanced-cluster-security/rhacs-main-rhel8:1777307791 | RHSA-2026:11217 |
Frequently Asked Questions
Is CVE-2026-32286 in your dependencies?
Find it across Go, including transitive dependencies.