CVE-2026-47877: Spring Security Authorization Server's default consent page renders user-controlled values without HTML entity

Routine

HIGH 8.2UPGRADE

CVE-2026-47877 is a high-severity flaw (CVSS 8.2) affecting spring security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Spring Security Authorization Server's default consent page renders user-controlled values without HTML entity encoding. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6

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 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-08-27
Last modified	2026-09-02

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-09-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 06:17 UTCPublished CVE record published
2026-09-02 15:23 UTCUpdated Record last modified

vmware spring security UPGRADE

Affected: >= 7.0.0 and < 7.0.6.1 · >= 7.1.0 and < 7.1.0.1

Fixed in: 7.0.6.1, 7.1.0.1

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy spring-security || rpm -q spring-security || spring-security --version

2. UPGRADE to 7.0.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-security

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 7.0.0 (Debian / Ubuntu)

apt-cache madison spring-security sudo apt install spring-security=<VERSION_BEFORE_7.0.0> sudo apt-mark hold spring-security

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

dnf --showduplicates list spring-security sudo dnf downgrade spring-security-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add spring-security

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.

Advisories and coverage

Official advisories

Spring Security Advisories: cve-2026-47877 - HIGH - Spring Security Authorization Server Default Consent Page is vulnerable to Cross-Site Scripting (XSS) 2026-08-20

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-2026-47877?

spring security: upgrade to 7.0.6.1, 7.1.0.1. Exact commands for each OS are on this page.

Is CVE-2026-47877 being exploited?

CVE-2026-47877 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-2026-47877 affect?

CVE-2026-47877 affects spring security. Severity is high (CVSS 8.2). Spring Security Authorization Server's default consent page renders user-controlled values without HTML entity encoding. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6

How urgent is CVE-2026-47877?

Priority 34/100. High severity

Software pages

VMware vulnerabilities

Related CVEs

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CVE-2026-22746 LOW 3.7 UPGRADE Vulnerability in Spring Spring Security
CVE-2026-22751 MEDIUM 4.8 UPGRADE Vulnerability in Spring Spring Security

References

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