SSRF in Mvantellingen Python-Zeep
CVE-2026-58501
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Mvantellingen Python-Zeep — versions >= 4.0.0, < 4.3.3
- Mvantellingen Zeep
- Python-Zeep Zeep
Weakness classification (CWE)
References
- github.com/mvantellingen/python-zeep/security/advisories/GHSA-4cc2-g9w2-fhf6 (Patch, Mitigation, Vendor Advisory)
- github.com/mvantellingen/python-zeep/commit/83eb07bc6c84d841329d4f88856fecdba86… (Patch)
- github.com/mvantellingen/python-zeep/releases/tag/4.3.3 (Release Notes)
Frequently asked questions
- What is CVE-2026-58501?
- CVE-2026-58501 is a medium-severity vulnerability in Mvantellingen Python-Zeep, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.9/10. Published 2026-07-08.
- How severe is CVE-2026-58501?
- Medium severity. CVSS v3 base score is 5.9 out of 10.