GHSA-j9f9-w8pj-32f8 CVE-2026-47890
Spring Framework Server Sent Event stream corruption while rendering fragments
- Severity
- 9.8 / 10
- Critical · CVSS 3.1
- Exploit chance (EPSS)
- 0.56%
- Chance of exploitation in the next 30 days. Higher than 46.89% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
- Fix
- Available
- 2 packages have a fixed version
Description
Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE) with view fragments. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19
Affected versions
Maven
| Package | Vulnerable | Fixed in |
|---|---|---|
| org.springframework:spring-webflux | >= 6.2.0, <= 6.2.19 |
No fix yet |
| org.springframework:spring-webflux | >= 7.0.0, < 7.0.9 |
7.0.9 |
| org.springframework:spring-webmvc | >= 6.2.0, <= 6.2.19 |
No fix yet |
| org.springframework:spring-webmvc | >= 7.0.0, < 7.0.9 |
7.0.9 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
org.springframework:spring-webflux Maven → 7.0.9
- maven
<dependency><groupId>org.springframework</groupId><artifactId>spring-webflux</artifactId><version>7.0.9</version></dependency>- gradle
implementation("org.springframework:spring-webflux:7.0.9")
org.springframework:spring-webmvc Maven → 7.0.9
- maven
<dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>7.0.9</version></dependency>- gradle
implementation("org.springframework:spring-webmvc:7.0.9")
Severity breakdown
CVSS 3.1 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
How to prevent it
- Implementation: Avoid using CRLF as a special sequence.
- Implementation: Appropriately filter or quote CRLF sequences in user-controlled input.
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-36p3-wjmg-h94x Remote Code Execution in Spring Framework | Critical Known exploited | Also affects org.springframework:spring-webflux |
| GHSA-9qf2-26p9-2q2q Spring Framework Header Predicate Bypass in WebFlux Functional Endpoints | Critical | Also affects org.springframework:spring-webflux |
| GHSA-pc63-qcmh-9cmg Spring Framework Improper Path Limitation in XsltView | Critical | Also affects org.springframework:spring-webmvc |
| GHSA-cjpg-rgq5-fr37 Spring Framework Multipart Request Smuggling in Spring MVC and WebFlux | Medium | Also affects org.springframework:spring-webflux |
| GHSA-vqgp-pf68-6947 Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL | Medium | Also affects org.springframework:spring-webflux |
| GHSA-957g-f97v-vppc Spring Framework Cross-site Scripting via JSP Form Tags | Medium | Also affects org.springframework:spring-webmvc |
| GHSA-3chg-m5w7-qfv5 Spring Framework Cross-site Scripting via JavaScriptUtils | Medium | Also affects org.springframework:spring-webmvc |
| GHSA-h3qp-gqrc-q736 Spring Framework Open Redirect in Spring MVC and WebFlux | Medium | Also affects org.springframework:spring-webflux |
MergeHarbor checks every repository's dependencies against this database, ranks what matters by exploitability and reachability, routes it to the owning team and opens the fix pull request.
Check your repos with MergeHarbor