GHSA-c77r-fh37-x2px is a medium-severity (CVSS 6.1) CWE-294 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.
OPA for Windows has an SMB force-authentication vulnerability
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-c77r-fh37-x2px.
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-c77r-fh37-x2px 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
github.com/open-policy-agent/opaReal-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
A SMB force-authentication vulnerability exists in all versions of OPA for Windows prior to v0.68.0. The vulnerability exists because of improper input validation, allowing a user to pass an arbitrary SMB share instead of a Rego file as an argument to OPA CLI or to one of the OPA Go library’s functions.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/open-policy-agent/opa | all versions | 0.68.0go get github.com/open-policy-agent/opa@v0.68.0 |
Detection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update github.com/open-policy-agent/opa to 0.68.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c77r-fh37-x2px 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-c77r-fh37-x2px can be triaged on real exposure rather than presence alone.
Tailored to GHSA-c77r-fh37-x2px. 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.
The SMB force-authentication vulnerability in OPA for Windows builds is classified as moderate severity due to its specific exploitation requirements and potential impact. The flaw arises from improper input validation, allowing an attacker to supply an arbitrary SMB share instead of a Rego file. However, exploitation…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat OpenShift distributed tracing 3.4 | rhosdt/tempo-gateway-opa-rhel8:rhosdt-3.4 | RHSA-2024:10948 |
Frequently Asked Questions
Is GHSA-c77r-fh37-x2px in your dependencies?
O3 Security finds GHSA-c77r-fh37-x2px across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.