How severe is CVE-2016-9814?

CVE-2016-9814 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2016-9814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9814?

CVE-2016-9814 primarily affects Simplesamlphp. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-9814?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-9814 published?

CVE-2016-9814 was published on 2017-02-17 and last updated on 2026-06-17.

CVE-2016-9814

CVE-2016-9814 is a critical-severity vulnerability in Simplesamlphp with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 8.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Simplesamlphp
Published: 2017-02-17
Last modified: 2026-06-17

Description

The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x before 1.10.3, and 2.x before 2.3.3 allows remote attackers to spoof SAML responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.

Frequently asked questions

What is CVE-2016-9814?: The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x before 1.10.3, and 2.x before 2.3.3 allows remote attackers to spoof SAML responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.
How severe is CVE-2016-9814?: CVE-2016-9814 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2016-9814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9814?: CVE-2016-9814 primarily affects Simplesamlphp. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-9814?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-9814 published?: CVE-2016-9814 was published on 2017-02-17 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:simplesamlphp:1.10:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:*:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:1.10:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:1.10.1:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:1.10.2:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.1:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.2:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.3:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:simplesamlphp:saml2:2.3.2:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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