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CVE-2026-89058

HIGHCVSS 7.4/10EPSS 0.33%

Last modified

CVE-2026-89058 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.

Metrics

CVSS 3.1
7.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS Probability
0.33%

26.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Red Hat—< 6.2.19.Final; >= 7.0.0.Alpha1, < 7.0.5.Final
Red HatRed Hat build of Apache Camel 4 for Quarkus 3All versions
Red HatRed Hat build of Apicurio Registry 3All versions
Red HatRed Hat build of Debezium 3All versions
Red HatRed Hat Build of KeycloakAll versions
Red HatRed Hat build of QuarkusAll versions
Red HatRed Hat Certificate System 10All versions
Red HatRed Hat Certificate System 11All versions
Red HatRed Hat Enterprise Linux 10All versions
Red HatRed Hat Enterprise Linux 8All versions
Red HatRed Hat Enterprise Linux 9All versions
Red HatRed Hat Fuse 7All versions
Red HatRed Hat JBoss Enterprise Application Platform 7All versions
Red HatRed Hat JBoss Enterprise Application Platform 8All versions
Red HatRed Hat JBoss Enterprise Application Platform Expansion PackAll versions
Red HatRed Hat Satellite 6All versions
Red HatRed Hat Single Sign-On 7All versions

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-89058?
A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.
How severe is CVE-2026-89058?
CVE-2026-89058 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89058?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST