GHSA-hpr6-f4vq-mxch is a critical-severity (CVSS 9.8) vulnerability in localstack. 2 public exploit references exist, so weaponization risk is real. A fix is available for localstack — see the affected versions and patch details below.
Command injection in LocalStack
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
GHSA-hpr6-f4vq-mxch by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 379,842 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
localstackReal-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
The dashboard component of StackLift LocalStack allows attackers to inject arbitrary shell commands via the functionName parameter.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | localstack | all versions | 0.12.10pip install --upgrade 'localstack==0.12.10' |
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 localstack, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update localstack to 0.12.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hpr6-f4vq-mxch 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 GHSA-hpr6-f4vq-mxch in your dependencies?
Find it across PyPI, including transitive dependencies.