What is CVE-2016-10149?

CVE-2016-10149 is a high-severity vulnerability in Pysaml2 Project, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2017-03-24.

How severe is CVE-2016-10149?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2016-10149 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XXE in Pysaml2 Project

CVE-2016-10149

XML External Entity (XXE) vulnerability in PySAML2 4.4.0 and earlier allows remote attackers to read arbitrary files via a crafted SAML XML request or response.

Vulnerability class: XXE (XML External Entity)

Published 2017-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.050 (92.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.050 · newest: 0.050 · change: 0.000

Affected products

Pysaml2 Project
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/rohe/pysaml2/issues/366 (Patch, Third Party Advisory, Issue Tracking)
access.redhat.com/errata/RHSA-2017:0936 (vendor-advisory)
www.openwall.com/lists/oss-security/2017/01/19/5 (mailing-list, Patch, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/97692 (vdb-entry)
www.debian.org/security/2017/dsa-3759 (vendor-advisory, Third Party Advisory)
github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b (Patch, Third Party Advisory, Issue Tracking)
bugs.debian.org/cgi-bin/bugreport.cgi (Patch, Third Party Advisory, Issue Tracking)
access.redhat.com/errata/RHSA-2017:0938 (vendor-advisory)
github.com/rohe/pysaml2/pull/379 (Patch, Third Party Advisory, Issue Tracking)
access.redhat.com/errata/RHSA-2017:0937 (vendor-advisory)

Frequently asked questions

What is CVE-2016-10149?: CVE-2016-10149 is a high-severity vulnerability in Pysaml2 Project, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2017-03-24.
How severe is CVE-2016-10149?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2016-10149 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.