VulnerabilityAnalyzed

CVE-2026-58501

From 4.0.0 before 4.3.3, Settings.forbid_external is defined but not enforced when parsing WSDL or XSD documents, allowing transitive xsd:import, xsd:include, wsdl:import, and lxml entity or DTD references to fetch attacker-chosen HTTP or HTTPS URLs.

MEDIUM 5.9EPSS 0.41%

Does this matter?

Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.

Description

Zeep is a Python SOAP client. From 4.0.0 before 4.3.3, Settings.forbid_external is defined but not enforced when parsing WSDL or XSD documents, allowing transitive xsd:import, xsd:include, wsdl:import, and lxml entity or DTD references to fetch attacker-chosen HTTP or HTTPS URLs. This issue is fixed in version 4.3.3.

CVSS 3.1: 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.41% probability · 34th percentile
CISA KEV: Not listed
Weakness: CWE-918
Affected: python-zeep/zeep
Source: security-advisories@github.com

References

https://github.com/mvantellingen/python-zeep/commit/83eb07bc6c84d841329d4f88856fecdba86f753ePatch
https://github.com/mvantellingen/python-zeep/releases/tag/4.3.3Release Notes
https://github.com/mvantellingen/python-zeep/security/advisories/GHSA-4cc2-g9w2-fhf6Mitigation, Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.