CVE-2016-10127

CRITICALNVD 9.09.0—

9.0

PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML request or response.

CVSS v3: 9.0
EG Score: 9.0(medium)
EPSS: 64.8%
KEV: Not listed

Published

March 3, 2017

Last Modified

May 13, 2026

Advisory Details (6)

Auto-updated May 22, 2026

🔬 Proof of concept available. Patch available.

generic

Fix XXE in XML parsing (related to #366) · IdentityPython/pysaml2@6e09a25 · GitHub

https://github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b

generic Patch Available

#850716 - python-pysaml2: CVE-2016-10149 - Debian Bug report logs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716

generic

http://www.securityfocus.com/bid/95376

generic

oss-security - Re: CVE request: python-pysaml2 XML external entity attack

http://www.openwall.com/lists/oss-security/2017/01/19/5

generic

Fix XXE in XML parsing (related to #366) by fruechel · Pull Request #379 · IdentityPython/pysaml2 · GitHub

https://github.com/rohe/pysaml2/pull/379

generic🟡 PoC Available

PySAML vulnerable to XXE · Issue #366 · IdentityPython/pysaml2 · GitHub

https://github.com/rohe/pysaml2/issues/366

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
pysaml2	0.4.3 ... 4.4.0 (23 versions)	4.5.0	—

Data Freshness Timeline

(refreshed 10× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:43 UTCepss_batch
2026-05-23 00:10 UTCEG score recompute
2026-05-22 21:15 UTCepss_batch
2026-05-22 15:46 UTCEG score recompute
2026-05-21 22:40 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 22:37 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-20 11:21 UTCepss_batch
2026-05-18 21:30 UTCepss_batch
2026-05-18 21:30 UTCepss_batch

Frequently asked(5)

What is CVE-2016-10127?

CVE-2016-10127 is a critical vulnerability published on March 3, 2017. PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML request or response.

When was CVE-2016-10127 disclosed?

CVE-2016-10127 was first published in the National Vulnerability Database on March 3, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-10127 actively exploited?

CVE-2016-10127 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 64.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-10127?

CVE-2016-10127 has a CVSS v3 base score of 9.0 (NVD).

How do I remediate CVE-2016-10127?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-10127, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-10127

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CVE-2016-10127

📅 Published

🔄 Last Modified

📋 Advisory Details (6)

Fix XXE in XML parsing (related to #366) · IdentityPython/pysaml2@6e09a25 · GitHub

#850716 - python-pysaml2: CVE-2016-10149 - Debian Bug report logs

oss-security - Re: CVE request: python-pysaml2 XML external entity attack

Fix XXE in XML parsing (related to #366) by fruechel · Pull Request #379 · IdentityPython/pysaml2 · GitHub

PySAML vulnerable to XXE · Issue #366 · IdentityPython/pysaml2 · GitHub

Affected Packages

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2016-10127?

Published

Last Modified

Advisory Details (6)

Frequently asked(5)