Improper Validation of Integrity Check Value Affecting robrichards/xmlseclibs package, versions <3.1.5
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-ROBRICHARDSXMLSECLIBS-15603249
- published15 Mar 2026
- disclosed13 Mar 2026
- creditSideni
Introduced: 13 Mar 2026
NewCVE-2026-32313 (opens in a new tab)How to fix?
Upgrade robrichards/xmlseclibs to version 3.1.5 or higher.
Overview
robrichards/xmlseclibs is a PHP library for XML Security.
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value in the decryptSymmetric() function, when checking tag length for the aes-128-gcm, aes-192-gcm, and aes-256-gcm encryption algorithms. An attacker can decrypt encrypted nodes and forge arbitrary ciphertexts by brute-forcing the authentication tag and recovering the GHASH key. The decryption is achieved by using XML parsing errors returned after modifying the ciphertext as an oracle.