Zeep SSRF because Settings.forbid_external is not enforced
Priority LOW 27CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Fixed python-zeep (mvantellingen): 4.3.3
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| mvantellingen | python-zeep | 4.0.0 to before 4.3.3 | 4.3.3 | Patch available | CNA |
- python-zeep Vendormvantellingen Affected 4.0.0 to before 4.3.3 Fixed in 4.3.3 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python-zeep:zeep:*:*:*:*:*:python:*:* | 4.0.0 to before 4.3.3 | Vulnerable | Python-zeep |
- cpe:2.3:a:python-zeep:zeep:*:*:*:*:*:python:*:* Versions 4.0.0 to before 4.3.3 Vulnerable ·Python-zeep
Remediation
- Fix · CNA python-zeep (mvantellingen) Fixed in 4.3.3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-58501
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences