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CVE-2016-10127

23
FAUCET Score

CVE-2016-10127 describes an XML External Entity (XXE) vulnerability in PySAML2, allowing remote attackers to execute arbitrary code or access sensitive information through specially crafted SAML XML requests or responses. This critical vulnerability, with a CVSS score of 9.0, has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:pysaml2_project:pysaml2:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.0CRITICAL

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.3
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 88th percentile among its peer group of 265 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: pysaml2Fixed in: 4.5.0

Vendor Advisories (2)

pipGHSA-m269-wj6g-c459critical

PySAML2 XML external entity attack

May 17, 2022
redhatCVE-2016-10127Moderate

python-pysaml2: Vulnerable to XML external entity attack

Jan 10, 2017

References

bugs.debian.org / cgi-bin/bugreport.cgi
Mailing ListThird Party Advisory
github.com / rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b
Patch
github.com / rohe/pysaml2/issues/366
Issue TrackingPatch
github.com / rohe/pysaml2/pull/379
Issue TrackingPatch
openwall.com / lists/oss-security/2017/01/19/5
Mailing ListThird Party Advisory
securityfocus.com / bid/95376
VDB Entry