How severe is CVE-2026-59316?

CVE-2026-59316 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 user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-59316 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-59316?

CVE-2026-59316 affects Broadcom Spring Authorization Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-59316?

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.

When was CVE-2026-59316 published?

CVE-2026-59316 was published on 2026-08-27 and last updated on 2026-08-31.

CVE-2026-59316

CVE-2026-59316 is a high-severity vulnerability in Broadcom Spring Authorization Server 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-79.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Broadcom Spring Authorization Server
Published: 2026-08-27
Last modified: 2026-08-31

Description

Spring Authorization Server's default consent page renders user-controlled values without HTML entity encoding. When using the DefaultConsentPage, an attacker can craft an OAuth2 authorization request containing a malicious value that is stored server-side and later rendered unencoded in the default consent page presented to the end user. Spring Authorization Server 1.5.0 - 1.5.8 Spring Authorization Server 1.4.0 - 1.4.11

Frequently asked questions

What is CVE-2026-59316?: Spring Authorization Server's default consent page renders user-controlled values without HTML entity encoding. When using the DefaultConsentPage, an attacker can craft an OAuth2 authorization request containing a malicious value that is stored server-side and later rendered unencoded in the default consent page presented to the end user. Spring Authorization Server 1.5.0 - 1.5.8 Spring Authorization Server 1.4.0 - 1.4.11
How severe is CVE-2026-59316?: CVE-2026-59316 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 user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-59316 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-59316?: CVE-2026-59316 affects Broadcom Spring Authorization Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-59316?: 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.
When was CVE-2026-59316 published?: CVE-2026-59316 was published on 2026-08-27 and last updated on 2026-08-31.

References

https://spring.io/security/cve-2026-59316

Affected products (1)

cpe:2.3:a:broadcom:spring_authorization_server:*:*:*:*:*:*:*:*

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