CVE-2020-36567 is a high-severity (CVSS 7.5) CWE-116 vulnerability in github.com/gin-gonic/gin. 1 public exploit or proof-of-concept reference is indexed, 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
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
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 |
Affected Products
gingin-gonicResearch 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.
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?
Find it across Go, including transitive dependencies.