xmlseclibs is a library written in PHP for working with XML Encryption and Signatures. Prior to 3.1.5, XML nodes encrypted with either aes-128-gcm, aes-192-gcm, or aes-256-gcm lack validation of the authentication tag length. An attacker can use this to brute-force an authentication tag, recover the GHASH key, and decrypt the encrypted nodes. It also allows to forge arbitrary ciphertexts without knowing the encryption key. This vulnerability is fixed in 3.1.5.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4v26-v6cg-g6f9 xmlseclibs: Missing AES-GCM Authentication Tag Validation on Encrypted Nodes Allows for Unauthorized Decryption
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 17 Mar 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Xmlseclibs Project
Xmlseclibs Project xmlseclibs
CPEs cpe:2.3:a:xmlseclibs_project:xmlseclibs:*:*:*:*:*:*:*:*
Vendors & Products Xmlseclibs Project
Xmlseclibs Project xmlseclibs

Mon, 16 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 16 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Robrichards
Robrichards xmlseclibs
Vendors & Products Robrichards
Robrichards xmlseclibs

Fri, 13 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Description xmlseclibs is a library written in PHP for working with XML Encryption and Signatures. Prior to 3.1.5, XML nodes encrypted with either aes-128-gcm, aes-192-gcm, or aes-256-gcm lack validation of the authentication tag length. An attacker can use this to brute-force an authentication tag, recover the GHASH key, and decrypt the encrypted nodes. It also allows to forge arbitrary ciphertexts without knowing the encryption key. This vulnerability is fixed in 3.1.5.
Title xmlseclibs is Missing AES-GCM Authentication Tag Validation on Encrypted Nodes Allows for Unauthorized Decryption
Weaknesses CWE-354
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-16T13:45:07.031Z

Reserved: 2026-03-11T21:16:21.660Z

Link: CVE-2026-32313

cve-icon Vulnrichment

Updated: 2026-03-16T13:45:02.497Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-16T14:19:33.837

Modified: 2026-03-17T19:25:41.563

Link: CVE-2026-32313

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-16T09:24:07Z

Weaknesses