CVE-2026-58501 Zeep SSRF because Settings.forbid_external is not enforced
Zeep fails to enforce external resource restrictions, allowing attackers to trigger server-side requests via malicious WSDL or XSD documents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58501?
CVE-2026-58501 is a medium-severity server-side request forgery vulnerability in mvantellingen python-zeep, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-58501?
3 open source packages ship an affected version, including zeep. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
zeep PyPI | From 4.0.0 | 4.3.3 |
zeep PyPI | From 4.0.0 | 4.3.3 |
zeep PyPI | From 4.0.0 | 4.3.3 |
Products include Python-Zeep Zeep.
How do I fix CVE-2026-58501?
Upgrade zeep to 4.3.3 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-58501 being exploited?
There is no known exploitation of CVE-2026-58501 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-58501, GHSA-4cc2-g9w2-fhf6, PYSEC-2026-2323, UBUNTU-CVE-2026-58501.