CVE-2026-59355: In versions of Spring Authorization Server 1.5.0 through 1.5.7, the authorization endpoint performs insufficie

Routine

MEDIUM 6.1UPGRADE

CVE-2026-59355 is a medium-severity flaw (CVSS 6.1) affecting spring authorization server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In versions of Spring Authorization Server 1.5.0 through 1.5.7, the authorization endpoint performs insufficient validation of the request_uri parameter. An attacker can craft a request containing an invalid request_uri paired with an unvalidated redirect_uri, which can result in an open redirect to an attacker-controlled site.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-08-27
Last modified	2026-09-01

Publisher (CNA): VMware · Vendor: broadcom

Last updated 2026-09-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 10:16 UTCPublished CVE record published
2026-09-01 16:08 UTCUpdated Record last modified

broadcom spring authorization server UPGRADE

Affected: >= 1.5.0 and < 1.5.7.1

Fixed in: 1.5.7.1

Safe to downgrade to: a release before 1.5.0

1. Check installed version

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

2. UPGRADE to 1.5.7.1 (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 1.5.0 (Debian / Ubuntu)

apt-cache madison spring-authorization-server sudo apt install spring-authorization-server=<VERSION_BEFORE_1.5.0> 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_1.5.0> 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-2026-59355?

spring authorization server: upgrade to 1.5.7.1. Exact commands for each OS are on this page.

Is CVE-2026-59355 being exploited?

CVE-2026-59355 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-2026-59355 affect?

CVE-2026-59355 affects spring authorization server. Severity is medium (CVSS 6.1). In versions of Spring Authorization Server 1.5.0 through 1.5.7, the authorization endpoint performs insufficient validation of the request_uri parameter. An attacker can craft a request containing an invalid request_uri paired with an unval

How urgent is CVE-2026-59355?

Priority 25/100. No elevated risk signals yet.

Related CVEs

CVE-2026-22752 CRITICAL 9.6 UPGRADE Authentication bypass by primary weakness vulnerability in Spring Security Spring Authorization Server. This
CVE-2026-59316 HIGH 8.2 UPGRADE Spring Authorization Server's default consent page renders user-controlled values without HTML entity encoding

References

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