CVE-2026-59316 Spring Authorization Server Default Consent Page is vulnerable to Cross-Site Scripting (XSS)

High 8.2 Published 27 Aug 2026 Updated 28 Aug 2026

Attackers can inject malicious scripts into the default consent page via crafted OAuth2 requests, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-59316?

CVE-2026-59316 is a high-severity cross-site scripting vulnerability in Spring Authorization Server, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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

Weakness: CWE-79

Which versions are affected by CVE-2026-59316?

It affects 1 product.

Products include Broadcom Spring Authorization Server.

How do I fix CVE-2026-59316?

No fix has been published for CVE-2026-59316 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-59316 being exploited?

There is no known exploitation of CVE-2026-59316 in the wild and no public exploit code.

Sources

Also known as GHSA-5pc3-v4c3-6pv4.