CVE Tools
Sign in

CVE-2026-32313

xmlseclibs is Missing AES-GCM Authentication Tag Validation on Encrypted Nodes Allows for Unauthorized Decryption

Published: Mar 13, 2026Updated: Mar 17, 2026 Sources: CVE List NVD GHSACWE-354
NVD MITRE
8.2CVSSHIGH
EPSS Score
0.2%
Top 95.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-354

Affected Products

xmlseclibsrobrichards
robrichards/xmlseclibsPackagistOSS Libraries
xmlseclibsxmlseclibs project
Library
OSS Libraries / generic-library
robrichardsaka robrichards
packagistpackage-ecosystemOSS Libraries
xmlseclibs projectoss-projectOSS Libraries

Exploitability

Official Patch Available

References

https://github.com/robrichards/xmlseclibs/security/advisories/GHSA-4v26-v6cg-g6f9
github.com
https://github.com/robrichards/xmlseclibs/commit/03062be78178cbb5e8f605cd255dc32a14981f92
github.com
https://github.com/robrichards/xmlseclibs/releases/tag/3.1.5
github.com
and 2 more references View all →

Timeline

Published
Mar 13, 2026
Last Updated
Mar 17, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-32313 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows