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

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

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N`)
- **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 available:** No
- **Published:** 27 Aug 2026
- **Updated:** 28 Aug 2026
- **Also known as:** GHSA-5pc3-v4c3-6pv4

## 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 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-59316?

It affects 1 product.


Products: 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.

## Is CVE-2026-59316 being exploited?

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

## Other vulnerabilities in Spring Authorization Server

- [CVE-2026-22752](https://insights.sbomify.com/CVE-2026-22752/): Auth bypass in Spring Authorization Server (critical 9.6)
- [CVE-2026-59355](https://insights.sbomify.com/CVE-2026-59355/): Spring Authorization Server: Open Redirect via request_uri parameter (medium 6.1)
- [CVE-2026-41008](https://insights.sbomify.com/CVE-2026-41008/): Spring Security Authorization Server Open Redirect via request_uri (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-59316 and fix it if it is affected.

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

Affected product: Spring Authorization Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-59316/ (Markdown: https://insights.sbomify.com/CVE-2026-59316/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59316
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59316
- OSV: https://osv.dev/vulnerability/CVE-2026-59316

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-59316/
Summaries are generated and may contain mistakes; the official description above is the record.