PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML request or response.
Priority MEDIUM 44CWE-611Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub.
Summary
PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML request or response.
Why it matters now
EPSS 0.02616 85th percentileScored 2026-11-07
Fix Fixed pysaml2 (PyPI): 4.5.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | pysaml2 (PyPI) | before 4.5.0 | 4.5.0 | Patch available | GHSA-m269-wj6g-c459 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- pysaml2 (PyPI) Vendor— Affected before 4.5.0 Fixed in 4.5.0 Patch available GHSA-m269-wj6g-c459
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:pysaml2_project:pysaml2:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Pysaml2 Project |
- cpe:2.3:a:pysaml2_project:pysaml2:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Pysaml2 Project
Remediation
- Fix · GHSA-m269-wj6g-c459 pysaml2 (PyPI) Fixed in 4.5.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
- Red Hat OpenStack Platform 10 (Newton)
- Red Hat OpenStack Platform 11 (Ocata)
- Red Hat OpenStack Platform 8 (Liberty)
- Red Hat OpenStack Platform 9 (Mitaka)
Timeline
- 2026-10-02 Threatist record created from CVE-2016-10127
- 2026-10-03 Alias added: GHSA-m269-wj6g-c459
References
Patch 3
Advisory 4
More Pysaml2 Project Pysaml2 vulnerabilities
- TI-2016-08225 XML External Entity (XXE) vulnerability in PySAML2 4.4.0 and earlier allows remote… CVSS 3.0HIGH 7.5
- TI-2017-14652 pysaml2 version 4.4.0 and older accept any password when run with python optimizations… CVSS 3.1HIGH 8.1
- TI-2020-04437 PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped… CVSS 3.1HIGH 7.5
- TI-2021-04342 Open default xmlsec1 key-type preference CVSS 3.1MEDIUM 6.5
- TI-2021-04341 SAML XML Signature wrapping CVSS 3.1MEDIUM 6.5
- TI-2017-14561 Python package pysaml2 version 4.4.0 and earlier reuses the initialization vector across… CVSS 3.0MEDIUM 5.3
Sources
- CVE-2016-10127 · CVE Program
- CVE-2016-10127 · NVD
- FIRST EPSS
- GHSA-m269-wj6g-c459 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-10127 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences