GHSA-mr82-8j83-vxmv is a medium-severity (CVSS 5.9) CWE-1333 vulnerability in pydantic. A fix is available for pydantic — see the affected versions and patch details below.
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.
Exploitation and automatability from CISA’s SSVC triage for GHSA-mr82-8j83-vxmv.
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
pydantic🐍pydanticReal-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
Regular expression denial of service in Pydantic < 2.4.0, < 1.10.13 allows remote attackers to cause denial of service via a crafted email string.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | pydantic | ≥ 2.0.0&&< 2.4.0 | 2.4.0pip install --upgrade 'pydantic==2.4.0' |
| 🐍PyPI | pydantic | all versions | 1.10.13pip install --upgrade 'pydantic==1.10.13' |
Affected Products
fedorafedoraprojectpydanticpydanticDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pydantic, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pydantic to 2.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mr82-8j83-vxmv is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
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.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for GHSA-mr82-8j83-vxmv (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Ansible Automation Platform 2.4 for RHEL 8 | automation-controller-0:4.5.7-1.el8ap | RHSA-2024:3781 |
Frequently Asked Questions
Is GHSA-mr82-8j83-vxmv in your dependencies?
Find it across PyPI, including transitive dependencies.