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CVE-2026-32600

Simplesamlphp Xml-security vulnerability

8.2 HIGHPublic exploitEPSS 0.17%
  1. Published16 Mar 2026

Description

xml-security is a library that implements XML signatures and encryption. Prior to versions 2.3.1 and 1.13.9, 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 2.3.1 and 1.13.9.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected products

Simplesamlphp Xml-security≥ 2.0.0 < 2.3.1 · < 1.13.9

Remediation

Fixed in
Simplesamlphp Xml-security≥ 2.3.1

References

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Frequently asked

Is CVE-2026-32600 being actively exploited?

CVE-2026-32600 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.17%.

How severe is CVE-2026-32600?

CVE-2026-32600 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.17% probability of exploitation.

Which products are affected by CVE-2026-32600?

Affected products include Simplesamlphp Xml-security.

How do I fix CVE-2026-32600?

Upgrade affected software to a fixed version, for example Simplesamlphp Xml-security 2.3.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-32600 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.