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Astral uv EUVDEUVD-2026-106912

| CVE-2026-114109 HIGH
Path Traversal (CWE-22)
2026-10-21 VulnCheck GHSA-m8vc-5xpp-qpqf
8.7
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Publish malicious wheel to registry
  2. Delivery
    Induce target to install wheel
  3. Exploit
    Crafted entry point name traverses out of scripts dir
  4. Execution
    Executable dropped into PATH directory
  5. Impact
    Shadowed binary runs attacker code

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires the victim to install a specifically crafted malicious wheel using uv prior to 0.11.15; the wheel must declare a console_scripts or gui_scripts entry point whose name contains path-traversal components so the generated executable lands outside the environment's scripts directory in a PATH directory. This is default uv behavior (no special configuration needed), but exploitation is limited by the requirement that the attacker first convince the target to install the untrusted wheel and that the installed uv version is below 0.11.15; there is no workaround other than upgrading.

Impact

This is a genuine but conditional risk rather than a drop-everything remote threat. The provided CVSS 4.0 score of 8.7 (High) rests on AV:N/AC:L/PR:N/UI:N, but this conflicts with the advisory text: exploitation explicitly requires that 'the attacker must induce their target into installing a malicious wheel,' which is meaningful user interaction and a supply-chain/social-engineering precondition the UI:N metric ignores. The scored impact (VC:H, VI:N, VA:N) is also questionable - the vulnerability is an arbitrary file write that shadows or overwrites executables on PATH, so the direct impact is integrity leading to code execution, not confidentiality. No EPSS score, CISA KEV listing, or public exploit was provided in the intelligence, so there is no public exploit identified at time of analysis and no evidence of active exploitation. Net assessment: a widely-used developer tool with a high-impact flaw, but exploitation depends on tricking a victim into installing an attacker-controlled package, which lowers real-world likelihood versus a true unauthenticated network RCE. Treat as a high-priority patch for developer/CI fleets, but recognize the attack is gated behind package-trust decisions rather than being internet-sprayable.

Exploit ScenarioDerived

An attacker publishes a malicious wheel (e.g., a typosquatted or dependency-confusion package) whose console_scripts or gui_scripts entry point name embeds path-traversal sequences. When a victim installs it using uv before 0.11.15, the generated executable is written outside the environment's scripts directory into a PATH directory, shadowing or overwriting a legitimate binary so the attacker's code runs the next time that command is invoked. No public exploit was identified in the provided data.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Arbitrary file write in Astral uv before 0.11.15 allows a malicious wheel to place generated console_scripts or gui_scripts entry points outside the environment's scripts directory, potentially shadowing or overwriting executables in a PATH directory for code execution. The flaw affects uv versions prior to 0.11.15 across the pip/uv and rust/uv packages and is a conditional risk: the attacker must first persuade the victim to install a crafted wheel, and the assessed vector is local with user interaction and changed scope. No public exploit code and no confirmed active exploitation were identified at time of analysis; vendor-released patch: uv 0.11.15.

RemediationAI

Upgrade to uv 0.11.15 or later; the vendor states this is the only remediation and that there is no workaround other than upgrading, with advisory details at https://github.com/astral-sh/uv/security/advisories/GHSA-4gg8-gxpx-9rph. Until upgrading, restrict uv installs to vetted wheels and inspect wheel metadata for console_scripts or gui_scripts names containing path separators or '..' components, recognizing that manual review is error-prone and does not fully fix the flaw. Running uv in a sandbox or container with a restricted PATH and no writable PATH directories can limit where a malicious entry point may land, at the cost of operational overhead and reduced installation convenience.

Affected VersionsENISA

uv 0 <0.11.15

Affected Packages

cargo uv fix: 0.11.15
pypi uv fix: 0.11.15
euvd uv fix: 0.11.15

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in cargo, pypi, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

uv is a Python package installer and resolver, written in Rust, that installs wheels and generates executable wrappers for Python entry points declared under console_scripts or gui_scripts. CWE-22 path traversal arises because uv prior to 0.11.15 joined the attacker-controlled entry point name to the environment scripts directory without adequately constraining the resulting path, so a name containing traversal components could write outside that directory. The supplied CPE cpe:2.3:a:astral-sh:uv:*:*:*:*:*:*:*:* identifies the Astral uv product line, and package metadata lists pip/uv <0.11.15 and rust/uv <0.11.15 as vulnerable. The independent assessment rates this CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, reflecting a local attack path that requires user interaction and can affect resources beyond the vulnerable component.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulnCheck) PRIMARY 8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
vuln.today AI 8.6 HIGH

Exploitation occurs during a local wheel install the victim must perform (AV:L, UI:R), escapes uv's environment into system PATH (S:C), and the shadowed-binary code execution yields full host impact.

3.1 AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H
Red Hat 7.8 HIGH

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
Patch available
Oct 21, 2026 - 02:01 EUVD
CVE Published
Oct 21, 2026 - 00:37 cve.org
HIGH 8.7

DescriptionCVE.org

uv before 0.11.15 contains a path traversal vulnerability that allows malicious wheels to write files outside the scripts directory via crafted console_scripts or gui_scripts entry point names. Attackers who induce users to install a malicious wheel can place executables in PATH directories, shadowing or overwriting existing binaries for code execution.

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 3 pypi packages depend on uv (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 0.11.15.

Technical POC Analysis

CWE-22 (Improper Limitation of a Pathname to a Restricted Directory).

Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.

Executive ViewAI

Why It Matters

A high-severity arbitrary file write flaw in Astral uv (versions prior to 0.11.15) lets a crafted Python wheel place entry-point scripts outside the intended environment directory, potentially overwriting or shadowing executables on a developer's PATH and enabling code execution. The exposure is concentrated in engineering workstation and CI/CD build pipelines where uv is used for package installation, and successful abuse requires a developer or automated job to install a malicious wheel. No public exploit code or active exploitation has been observed, but the supply-chain nature of the vector warrants prompt remediation.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.4%
Top 69% exploitable
Prevalence
High
rapidly adopted Python package/project manager, widely used across dev and CI
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Related Vulnerabilities in Astral uv Path Traversal in Package Extraction

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Vendor StatusVendor

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