What’s Vulnerable › Vulnerabilities

CVE-2020-1695

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-19 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• Fedoraproject Fedora: 32, 33
• Red Hat, Inc. resteasy: from 3.0.0 before 3.12.0; from 4.0.0 before 4.6.0 — fixed in 3.12.0, 4.6.0

How to fix

Upgrade to a fixed version: Red Hat, Inc. resteasy 3.12.0, 4.6.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1695
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJDMT443YZWCBS5NS76XZ7TL3GK7BXHL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RX22C6I56BJUER76IIPYHGZIWBQIU3CQ/
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1695
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJDMT443YZWCBS5NS76XZ7TL3GK7BXHL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RX22C6I56BJUER76IIPYHGZIWBQIU3CQ/

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