CVE-2021-3028 is a critical-severity (CVSS 9.8) Improper Input Validation vulnerability in git-big-picture. A fix is available for git-big-picture — see the affected versions and patch details below.
git-big-picture Code Execution
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
git-big-pictureReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
git-big-picture before 1.0.0 mishandles ' characters in a branch name, leading to code execution.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | git-big-picture | all versions | 1.0.0pip install --upgrade 'git-big-picture==1.0.0' |
Affected Products
git-big-picturegit-big-picture_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for git-big-picture, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update git-big-picture to 1.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-3028 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-2021-3028 in your dependencies?
Find it across PyPI, including transitive dependencies.