CVE-2022-33127 is a critical-severity (CVSS 9.8) vulnerability in diffy. A fix is available for diffy — see the affected versions and patch details below.
Improper handling of double quotes in file name in Diffy in Windows environment
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
diffyReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
The function that calls the diff tool in versions of Diffy prior to 3.4.1 does not properly handle double quotes in a filename when run in a Windows environment. This allows attackers to execute arbitrary commands via a crafted string.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | diffy | all versions | 3.4.1bundle update diffy --conservative |
Affected Products
diffydiffy_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for diffy, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update diffy to 3.4.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-33127 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.
Frequently Asked Questions
Is CVE-2022-33127 in your dependencies?
Find it across RubyGems, including transitive dependencies.