CVE-2026-59316: Spring Authorization Server's default consent page renders user-controlled values without HTML entity encoding

Routine

HIGH 8.2UPGRADE

CVE-2026-59316 is a high-severity flaw (CVSS 8.2) affecting spring authorization server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-08-27
Last modified	2026-08-31

Publisher (CNA): VMware · Vendor: broadcom

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 20:17 UTCPublished CVE record published
2026-08-31 23:39 UTCUpdated Record last modified

broadcom spring authorization server UPGRADE

Affected: >= 1.4.0 and < 1.4.12 · >= 1.5.0 and < 1.5.9

Fixed in: 1.4.12, 1.5.9

Safe to downgrade to: a release before 1.4.0

1. Check installed version

apt-cache policy spring-authorization-server || rpm -q spring-authorization-server || spring-authorization-server --version

2. UPGRADE to 1.4.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-authorization-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-authorization-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.4.0 (Debian / Ubuntu)

apt-cache madison spring-authorization-server sudo apt install spring-authorization-server=<VERSION_BEFORE_1.4.0> sudo apt-mark hold spring-authorization-server

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spring-authorization-server sudo dnf downgrade spring-authorization-server-<VERSION_BEFORE_1.4.0> sudo dnf versionlock add spring-authorization-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59316?

spring authorization server: upgrade to 1.4.12, 1.5.9. Exact commands for each OS are on this page.

Is CVE-2026-59316 being exploited?

CVE-2026-59316 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59316 affect?

CVE-2026-59316 affects spring authorization server. Severity is high (CVSS 8.2). 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 st

How urgent is CVE-2026-59316?

Priority 35/100. High severity

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References

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