What is CVE-2024-49766?

Werkzeug is a Web Server Gateway Interface web application library. On Python = 3.11, or not using Windows, are not vulnerable. Werkzeug version 3.0.6 contains a patch.

How severe is CVE-2024-49766?

CVE-2024-49766 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-49766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-49766?

CVE-2024-49766 affects Palletsprojects Werkzeug. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-49766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-49766 have an EU (EUVD) identifier?

Yes. CVE-2024-49766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3031.

When was CVE-2024-49766 published?

CVE-2024-49766 was published on 2024-10-25 and last updated on 2026-06-17.

CVE-2024-49766

CVE-2024-49766 is a medium-severity vulnerability in Palletsprojects Werkzeug with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-3031
Weakness: CWE-22
Affected product: Palletsprojects Werkzeug
Published: 2024-10-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2024-49766?: 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.
How severe is CVE-2024-49766?: CVE-2024-49766 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-49766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-49766?: CVE-2024-49766 affects Palletsprojects Werkzeug. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-49766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-49766 have an EU (EUVD) identifier?: Yes. CVE-2024-49766 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3031.
When was CVE-2024-49766 published?: CVE-2024-49766 was published on 2024-10-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*

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