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TI-2024-33233 Aliases CVE-2024-49766GHSA-f9vj-2wh5-fj8j

Werkzeug safe_join not safe on Windows

Priority LOW 29CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

Werkzeug is a Web Server Gateway Interface web application library. On Python < 3.11 on Windows, os.path.isabs() does not catch UNC paths like //server/share. Werkzeug's safe_join() relies on this check, and so can produce a path that is not safe, potentially allowing unintended access to data. Applications using Python >= 3.11, or not using Windows, are not vulnerable. Werkzeug version 3.0.6 contains a patch.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00776 56th percentileScored 2026-11-07
Fix Fixed werkzeug (pallets): 3.0.6Werkzeug (PyPI): 3.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
palletswerkzeugbefore 3.0.63.0.6Patch availableCNA
—Werkzeug (PyPI)before 3.0.63.0.6Patch availableGHSA-f9vj-2wh5-fj8j
  • werkzeug Vendorpallets Affected before 3.0.6 Fixed in 3.0.6 Patch available CNA
  • Werkzeug (PyPI) Vendor— Affected before 3.0.6 Fixed in 3.0.6 Patch available GHSA-f9vj-2wh5-fj8j

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*before 3.0.6Vulnerablepallets
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:* Versions before 3.0.6 Vulnerable ·pallets
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA werkzeug (pallets) Fixed in 3.0.6
  • Fix · GHSA-f9vj-2wh5-fj8j Werkzeug (PyPI) Fixed in 3.0.6 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 10 products
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ceph Storage 5
  • Red Hat Ceph Storage 6
  • Red Hat Ceph Storage 7
  • Red Hat Enterprise Linux 8
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenStack Platform 16.2
  • Red Hat OpenStack Platform 17.1
  • Red Hat Quay 3
  • Red Hat Storage 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-49766
  2. 2026-10-03 Alias added: GHSA-f9vj-2wh5-fj8j

References

Patch 1

Advisory 3

Other 3

  • TI-2019-10671 In Pallets Werkzeug before 0.15.5, SharedDataMiddleware mishandles drive names (such as C:) in Windows pathnames. CVSS 3.1HIGH 7.5
  • TI-2022-11856 Improper parsing of HTTP requests in Pallets Werkzeug v2.1.0 and below allows attackers… CVSS 3.1CRITICAL 9.8
  • TI-2023-10880 Werkzeug may allow high resource usage when parsing multipart form data with many fields CVSS 3.1HIGH 7.5
  • TI-2024-22527 Werkzeug's improper usage of a pathname and improper CSRF protection results in the remote command execution CVSS 3.1HIGH 7.5
  • TI-2024-33234 Werkzeug possible resource exhaustion when parsing file data in forms CVSS 4.0MEDIUM 6.9
  • TI-2023-24778 Uncontrolled resource consumption in pallets werkzeug CVSS 3.1HIGH 8.0
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences