GHSA-xrjj-mj9h-534m — http2
MEDIUMGHSA-xrjj-mj9h-534m is a medium-severity (CVSS 5.3) CWE-770 vulnerability in golang.org/x/net/http2. A fix is available for golang.org/x/net/http2 — see the affected versions and patch details below.
golang.org/x/net/http2 vulnerable to possible excessive memory growth
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-xrjj-mj9h-534m plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,166 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
golang.org/x/net/http2🐹golang.org/x/netReal-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 attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large keys can cause the server to allocate approximately 64 MiB per open connection.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | golang.org/x/net/http2 | all versions | 0.4.0go get golang.org/x/net/http2@v0.4.0 |
| 🐹Go | golang.org/x/net | all versions | 0.4.0go get golang.org/x/net@v0.4.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for golang.org/x/net/http2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update golang.org/x/net/http2 to 0.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xrjj-mj9h-534m is resolved across your whole dependency graph.
Workarounds
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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-xrjj-mj9h-534m can be triaged on real exposure rather than presence alone.
Tailored to GHSA-xrjj-mj9h-534m. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
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.
Within Red Hat OpenShift Container Platform, the grafana container is listed as will not fix. Since OCP 4.10, Grafana itself is not shipped and the Grafana web server is protected behind an OAuth proxy server.
| Product | Fixed in | Advisory |
|---|---|---|
| Logging subsystem for Red Hat OpenShift 5.4 | openshift-logging/lokistack-gateway-rhel8:v5.4.11-10 | RHSA-2023:0632 |
| Logging subsystem for Red Hat OpenShift 5.4 | openshift-logging/eventrouter-rhel8:v0.4.0-95 | RHSA-2023:0931 |
| MTA-6.0-RHEL-8 | mta/mta-admin-addon-rhel8:6.0.1-8 | RHSA-2023:0934 |
| NETWORK-OBSERVABILITY-1.2.0-RHEL-9 | network-observability/network-observability-console-plugin-rhel9:v1.2.0-19 | RHSA-2023:1817 |
| OADP-1.0-RHEL-8 | oadp/oadp-registry-rhel8:1.0.7-3 | RHSA-2023:0692 |
| OADP-1.1-RHEL-8 | oadp/oadp-kubevirt-velero-plugin-rhel8:1.1.2-18 | RHSA-2023:1174 |
| OpenShift Developer Tools and Services for OCP 4.9 | ocp-tools-4/service-binding-operator-bundle:v1.3.3-5 | RHSA-2023:0918 |
| Openshift Serverless 1 on RHEL 8 | openshift-serverless-clients-0:1.6.1-2.el8 | RHSA-2023:1179 |
Frequently Asked Questions
Is GHSA-xrjj-mj9h-534m in your dependencies?
O3 Security finds GHSA-xrjj-mj9h-534m across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.