Uv: uv: specially crafted zip archives lead to arbitrary code execution due to parsing differentials
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.
- Published
- Feb 27, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 4th percentile
- CWE
- CWE-1286
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Report tools
Action score
25
Monitor
Low priority for now.
- CVSS
- 25 / 40 · 6.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 6.3
- CNA · redhat
- 6.3
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| astral | uv | cpe:2.3:a:astral:uv |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- astral uvbefore 0.9.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
astral-sh uv
- before 0.9.6affected · semver
Red Hat Red Hat AI Inference Server
- all versionsunknown
- all versionsunknown
- all versionsunknown
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
Red Hat Red Hat OpenShift AI (RHOAI)
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
- all versionsaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| crates.io | uv | before 0.9.6 | 0.9.6 |
| openSUSE:Leap 16.0 | python-uv | before 0.7.18-160000.4.1 | 0.7.18-160000.4.1 |
| PyPI | uv | before 0.9.6 | 0.9.6 |
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| astral-sh uv | 0.9.6 | Vendor (CNA) |
| crates.io:uv | 0.9.6 | Package registry (OSV) |
| opensuse:python-uv | 0.7.18-160000.4.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| PyPI:uv | 0.9.6 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- Administrator privileges are required.
- A user must open a link or visit a page.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- High
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-1286 · Improper Validation of Syntactic Correctness of InputCVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
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Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/security/cve/CVE-2025-13327
- bugzilla.redhat.com/show_bug.cgi?id=2407263
- github.com/astral-sh/uv
- github.com/astral-sh/uv/commit/da659fee4898a73dbc75070f3e82d49f745e4628
- github.com/astral-sh/uv/security/advisories/GHSA-pqhf-p39g-3x64
Vendor advisories and official records. Exploit/PoC links are deliberately left out.