Improper Validation of Integrity Check Value Affecting simplesamlphp/xml-security package, versions <2.3.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-PHP-SIMPLESAMLPHPXMLSECURITY-15627418
- published15 Mar 2026
- disclosed13 Mar 2026
- creditSideni
Introduced: 13 Mar 2026
CVE-2026-32600 (opens in a new tab)How to fix?
Upgrade simplesamlphp/xml-security to version 2.3.1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value due to missing validation of the AES-GCM authentication tag on encrypted XML nodes. An attacker can decrypt sensitive data and forge arbitrary ciphertexts by brute-forcing the authentication tag and recovering the GHASH key.