CVE-2020-36567 is a high-severity (CVSS 7.5) CWE-116 vulnerability in github.com/gin-gonic/gin. 1 public exploit reference exists, so weaponization risk is real. A fix is available for github.com/gin-gonic/gin — see the affected versions and patch details below.
Gin's default logger allows unsanitized input that can allow remote attackers to inject arbitrary log lines
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-2020-36567.
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
CVE-2020-36567 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 378,156 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/gin-gonic/ginReal-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
Gin is a HTTP web framework written in Go (Golang). Unsanitized input in the default logger in github.com/gin-gonic/gin before v1.6.0 allows remote attackers to inject arbitrary log lines.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/gin-gonic/gin | all versions | 1.6.0go get github.com/gin-gonic/gin@v1.6.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/gin-gonic/gin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/gin-gonic/gin to 1.6.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-36567 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 CVE-2020-36567 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2020-36567. 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.
| Product | Fixed in | Advisory |
|---|---|---|
| MTA-6.0-RHEL-8 | mta/mta-admin-addon-rhel8:6.0.1-8 | RHSA-2023:0934 |
| Red Hat Migration Toolkit for Containers 1.7 | rhmtc/openshift-migration-controller-rhel8:v1.7.8-6 | RHSA-2023:1428 |
Frequently Asked Questions
Is CVE-2020-36567 in your dependencies?
O3 Security finds CVE-2020-36567 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.