GHSA-9394-xfq9-6qrp — calico
MEDIUMGHSA-9394-xfq9-6qrp is a medium-severity (CVSS 5.5) Information Exposure vulnerability in github.com/projectcalico/calico. A fix is available for github.com/projectcalico/calico — see the affected versions and patch details below.
Calico vulnerable to pod route hijacking
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-9394-xfq9-6qrp 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 378,567 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
github.com/projectcalico/calico🐹github.com/projectcalico/calico🐹github.com/projectcalico/calicoReal-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
Clusters using Calico (version 3.22.1 and below), Calico Enterprise (version 3.12.0 and below), may be vulnerable to route hijacking with the floating IP feature. Due to insufficient validation, a privileged attacker may be able to set a floating IP annotation to a pod even if the feature is not enabled. This may allow the attacker to intercept and reroute traffic to their compromised pod.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/projectcalico/calico | ≥ 3.22.0&&< 3.22.2 | 3.22.2go get github.com/projectcalico/calico@v3.22.2 |
| 🐹Go | github.com/projectcalico/calico | ≥ 3.21.0&&< 3.21.5 | 3.21.5go get github.com/projectcalico/calico@v3.21.5 |
| 🐹Go | github.com/projectcalico/calico | all versions | 3.20.5go get github.com/projectcalico/calico@v3.20.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/projectcalico/calico, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/projectcalico/calico to 3.22.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9394-xfq9-6qrp 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-9394-xfq9-6qrp can be triaged on real exposure rather than presence alone.
Tailored to GHSA-9394-xfq9-6qrp. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-9394-xfq9-6qrp in your dependencies?
O3 Security finds GHSA-9394-xfq9-6qrp across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.