CVE-2026-59281 Spring Framework Cross-site Scripting via EscapedErrors
Attackers can inject arbitrary HTML or JavaScript via field errors in Spring MVC/WebFlux apps when HTML escaping is enabled but specific accessors are used.
- 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
What is CVE-2026-59281?
CVE-2026-59281 is a medium-severity cross-site scripting vulnerability in Vmware Spring Framework, 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 MVC and WebFlux applications that obtain a data-binding Errors instance with HTML escaping enabled and then render field errors using the no-argument Errors.getFieldErrors() or Errors.getFieldError() accessors are vulnerable to arbitrary HTML/JavaScript code injection, potentially resulting in a reflected cross-site scripting (XSS) vulnerability. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49 Spring Framework 5.2.25.RELEASE and earlier
Weakness: CWE-79
Which versions are affected by CVE-2026-59281?
It affects 1 product.
Products include Vmware Spring Framework.
How do I fix CVE-2026-59281?
Upgrade to a fixed version.
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-2026-59281 being exploited?
There is no known exploitation of CVE-2026-59281 in the wild and no public exploit code.
Other vulnerabilities in Vmware Spring Framework
- CVE-2026-47884 Spring Framework Improper Path Limitation in XsltView
- CVE-2026-47890 Spring Framework Server Sent Event stream corruption while rendering fragments
- CVE-2026-47891 Spring Framework maxInMemorySize Bypassed in Jaxb2Decoder
- CVE-2026-47892 Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints
- CVE-2026-59313 Server Sent Event stream corruption in Spring MVC functional web framework
Sources
Also known as CLEANSTART-2026-HB81544, CLEANSTART-2026-IL27901, CLEANSTART-2026-RS34156, CLEANSTART-2026-SC51338, DEBIAN-CVE-2026-59281, GHSA-549f-4rpc-3rw9 and 1 more.