Improper Input Validation Affecting simplesamlphp package, versions <1.14.11-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-SIMPLESAMLPHP-18016450
- published19 Jul 2026
- disclosed17 Feb 2017
Introduced: 17 Feb 2017
CVE-2016-9955 (opens in a new tab)How to fix?
Upgrade Echo:latest simplesamlphp to version 1.14.11-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream simplesamlphp package and not the simplesamlphp package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
The SimpleSAML_XML_Validator class constructor in SimpleSAMLphp before 1.14.11 might allow remote attackers to spoof signatures on SAML 1 responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.