NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
🐹
🐹 Go
Not in CISA KEV
HIGH severity

Out of bounds memory access in github.com/open-policy-agent/opaGHSA-x7f3-62pm-9p38

HIGHFix: open-policy-agent/opa#4548

GHSA-x7f3-62pm-9p38 is a high-severity (CVSS 7.5) vulnerability in github.com/open-policy-agent/opa. A fix is available for github.com/open-policy-agent/opa — see the affected versions and patch details below.

Also known asCVE-2022-28946GO-2022-0587
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs64th percentile — riskier than 64% of all scored CVEsHighest risk
0.00%0.51%1.03%1.54%0.4%1.0%May 26Sep 26Nov 26

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

1 pkg affected
🐹github.com/open-policy-agent/opa

Real-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

An issue in the component ast/parser.go of Open Policy Agent v0.39.0 causes the application to incorrectly interpret every expression, causing a Denial of Service (DoS) via triggering out-of-range memory access.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/open-policy-agent/opaall versions0.40.0go get github.com/open-policy-agent/opa@v0.40.0

Affected Products

1 product · 1 configurations
Application
open policy agentopenpolicyagent
1 version
0.39.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/open-policy-agent/opa, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/open-policy-agent/opa to 0.40.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-x7f3-62pm-9p38 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

An issue in the component ast/parser.go of Open Policy Agent v0.39.0 causes the application to incorrectly interpret every expression, causing a Denial of Service (DoS) via triggering out-of-range memory access.
O3 Security · Impact-Aware SCA

Is GHSA-x7f3-62pm-9p38 in your dependencies?

Find it across Go, including transitive dependencies.

Scan my dependencies How O3 SCA works
Out of bounds memory access in github.com/open-policy…