How severe is CVE-2026-32313?

CVE-2026-32313 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-32313 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32313?

CVE-2026-32313 affects Xmlseclibs Project Xmlseclibs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32313?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-32313 have an EU (EUVD) identifier?

Yes. CVE-2026-32313 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12094.

When was CVE-2026-32313 published?

CVE-2026-32313 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-32313

CVE-2026-32313 is a high-severity vulnerability in Xmlseclibs Project Xmlseclibs with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-354.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12094
Weakness: CWE-354
Affected product: Xmlseclibs Project Xmlseclibs
Published: 2026-03-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-32313?: 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.
How severe is CVE-2026-32313?: CVE-2026-32313 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-32313 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32313?: CVE-2026-32313 affects Xmlseclibs Project Xmlseclibs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32313?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-32313 have an EU (EUVD) identifier?: Yes. CVE-2026-32313 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12094.
When was CVE-2026-32313 published?: CVE-2026-32313 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xmlseclibs_project:xmlseclibs:*:*:*:*:*:*:*:*

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