MEDIUM CVSS 6.3
Published: 2026-02-27

CVE-2025-13327

astral uv Security Advisory (CVE-2025-13327)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-13327 impacting astral uv. Evaluated with CVSS Base Score of 6.3 (MEDIUM).

Original NVD Description

Source: NIST NVD
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.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
High (AC:H)
Depends on race conditions or environment
Privileges Required
High (PR:H)
Administrative credentials required
User Interaction
Required (UI:R)
User must click or open resource
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product astral / uv
Affected Versions *
Weakness Enumeration CWE-1286

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2025-13327 impacting astral uv.

⚡ Nuclei Detection Template (YAML) cve-2025-13327.yaml
id: cve-2025-13327

info:
  name: astral uv - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2025-13327 affecting astral uv.
    Evaluation: A flaw was found in uv. This vulnerability allows an attacker to execute malicious code during package resolution or installation via specially crafte...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-13327
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
    cvss-score: 6.3
    cve-id: CVE-2025-13327
    cwe-id: CWE-1286
  tags: cve,cve-2025-13327,astral,uv,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "uv"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-13327.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-13327
# Target: astral uv | CVSS: 6.3 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-13327 (astral uv)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against astral uv scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2025-13327.sh
# Recommended Remediation & Patching Commands for CVE-2025-13327
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install uv 2>/dev/null || \
sudo dnf upgrade uv 2>/dev/null || \
sudo yum update uv

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i uv 2>/dev/null || rpm -qa | grep -i uv

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2025-13327 in astral uv?

Review vendor-specific security notices and update astral uv packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2025-13327?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2025-13327?

CVE-2025-13327 is classified with a CVSS 3.1 Base Score of 6.3 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
6.3
MEDIUM SEVERITY
CVE ID CVE-2025-13327
Weakness CWE-1286
Vendor astral
Product uv
Published 2026-02-27
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H