uv has ZIP payload obfuscation through parsing differentialsGHSA-v653-r55g-hcmg
MEDIUMFix: astral-sh/uv@da659feGHSA-v653-r55g-hcmg is a medium-severity (CVSS 6.3) CWE-1286 vulnerability in uv. A fix is available for uv — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-v653-r55g-hcmg.
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
uvReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
A flaw was found in uv. This vulnerability allows an attacker to execute malicious code during package resolution or installation via specially crafted ZIP (Zipped Information Package) archives that exploit parsing differentials, requiring user interaction to install an attacker-controlled package.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | uv | all versions | 0.9.6cargo update -p uv --precise 0.9.6 |
Affected Products
uvastralDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for uv, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update uv to 0.9.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-v653-r55g-hcmg 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.
This vulnerability is rated Moderate for Red Hat products. It allows arbitrary code execution through specially crafted ZIP archives when using the `uv` tool to install attacker-controlled Python packages. Exploitation requires user interaction to initiate the package installation. This affects components within Red…
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-v653-r55g-hcmg (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat OpenShift AI 3.0 | rhai/base-image-rocm-rhel9:1793041981 | RHSA-2026:91219 |
| Red Hat OpenShift AI 3.0 | rhai/base-image-cpu-rhel9:1793042072 | RHSA-2026:91232 |
| Red Hat OpenShift AI 3.0 | rhai/base-image-cuda-rhel9:1793042067 | RHSA-2026:91236 |
| Red Hat OpenShift AI 3.0 | rhai/base-image-cpu-rhel9:1793329709 | RHSA-2026:94459 |
| Red Hat OpenShift AI 3.0 | rhai/base-image-cuda-rhel9:1793328358 | RHSA-2026:94476 |
Frequently Asked Questions
Is GHSA-v653-r55g-hcmg in your dependencies?
Find it across crates.io, including transitive dependencies.