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Fencer Intel
high 7.4

CVE-2026-89058 json

Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config

published last mo. modified 15h ago also EUVD-2026-82736 , GHSA-972r-f3fv-whm3

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository resteasy/resteasy. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat RESTEasy 6.2.19.Final, 7.0.5.Final
  • Red Hat Red Hat Build of Apache Camel 3.33.4.redhat 6.2.19.Final-redhat-00003
  • Red Hat Red Hat build of Quarkus 3.27.6.redhat 6.2.19.Final-redhat-00003
  • Red Hat Red Hat build of Quarkus 3.33.4.redhat 6.2.19.Final-redhat-00003
  • Red Hat Red Hat Enterprise Linux 10 0:11.9.0-6.el10_2.1, 0:11.9.0-9.el10_3.1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:11.6.0-3.el10_0.2
  • Red Hat Red Hat Enterprise Linux 9 0:3.0.26-20.el9_8.1, 0:3.0.26-20.el9_9.1
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.0.26-16.el9_2.1
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:3.0.26-20.el9_4.2
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.0.26-20.el9_6.2
  • resteasy RHEL 9 3.0.26-20.el9_8.1
  • pki-resteasy-core RHEL 9 3.0.26-20.el9_8.1
  • pki-resteasy-client RHEL 9 3.0.26-20.el9_8.1
  • pki-resteasy-jackson2-provider RHEL 9 3.0.26-20.el9_8.1
  • pki-resteasy-servlet-initializer RHEL 9 3.0.26-20.el9_8.1

red hat advisories RHSA-2026:85234

  • idm-pki-ca AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-kra AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-acme AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-base AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-java AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-tools AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • idm-pki-server AlmaLinux 10 11.9.0-6.el10_2.1.alma.1
  • python3-idm-pki AlmaLinux 10 11.9.0-6.el10_2.1.alma.1

almalinux advisories ALSA-2026:92408ALSA-2026:85234

  • resteasy Rocky Linux 9 3.0.26-20.el9_8.1
  • dogtag-pki Rocky Linux 10 11.9.0-6.el10_2.1.rocky.0.1

rocky linux advisories RLSA-2026:98494RLSA-2026:92408RLSA-2026:85234

Is CVE-2026-89058 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-89058 updated cvss 7.4

resteasy-core: RESTEasy: CorsFilter Reflects Arbitrary Origin with Credentials under Wildcard Config

  • Red Hat build of Apache Camel 4 for Quarkus 3 resteasy-core
    affected: no fix available
  • Red Hat build of Apicurio Registry 3 resteasy-core
    affected: no fix available “Fix deferred”
  • Red Hat build of Debezium 3 resteasy-core Red Hat Build of Keycloak resteasy-core, rhbk/keycloak-rhel9-operator Red Hat Certificate System 10 redhat-pki Red Hat Certificate System 11 redhat-pki
    affected: no fix available
  • Red Hat Fuse 7 resteasy-core, resteasy-jaxrs Red Hat JBoss Enterprise Application Platform 7 resteasy-jaxrs, jboss-eap-7/eap74-els-openjdk8-openshift-rhel8, jboss-eap-7/eap74-els-openjdk11-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat JBoss Enterprise Application Platform Expansion Pack resteasy-core
    affected: no fix available
  • Red Hat Single Sign-On 7 resteasy-jaxrs
    affected: no fix available “Fix deferred”
  • Red Hat Build of Apache Camel 3.33.4.redhat resteasy-core 6.2.19.Final-redhat-00003
    fixed: vendor fix RHSA-2026:83670
  • Red Hat build of Quarkus 3.27.6.redhat resteasy-core 6.2.19.Final-redhat-00003
    fixed: vendor fix RHSA-2026:83082
show 12 more
  • Red Hat build of Quarkus 3.33.4.redhat resteasy-core 6.2.19.Final-redhat-00003
    fixed: vendor fix RHSA-2026:83520
  • Red Hat Enterprise Linux AppStream (v. 9) resteasy 3.0.26-20.el9_8.1, resteasy 3.0.26-20.el9_9.1, pki-resteasy-core 3.0.26-20.el9_8.1, pki-resteasy-core 3.0.26-20.el9_9.1, pki-resteasy-client 3.0.26-20.el9_8.1, pki-resteasy-client 3.0.26-20.el9_9.1, +4 more
    fixed: vendor fix RHSA-2026:85234
  • Red Hat Enterprise Linux AppStream (v. 10) dogtag-pki 11.9.0-6.el10_2.1, dogtag-pki 11.9.0-9.el10_3.1, idm-pki-ca 11.9.0-6.el10_2.1, idm-pki-ca 11.9.0-9.el10_3.1, idm-pki-kra 11.9.0-6.el10_2.1, idm-pki-kra 11.9.0-9.el10_3.1, +12 more
    fixed: vendor fix RHSA-2026:92408
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) resteasy 3.0.26-16.el9_2.1, pki-resteasy-core 3.0.26-16.el9_2.1, pki-resteasy-client 3.0.26-16.el9_2.1, pki-resteasy-jackson2-provider 3.0.26-16.el9_2.1
    fixed: vendor fix RHSA-2026:96077
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) resteasy 3.0.26-20.el9_4.2, pki-resteasy-core 3.0.26-20.el9_4.2, pki-resteasy-client 3.0.26-20.el9_4.2, pki-resteasy-jackson2-provider 3.0.26-20.el9_4.2, pki-resteasy-servlet-initializer 3.0.26-20.el9_4.2
    fixed: vendor fix RHSA-2026:95505
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) dogtag-pki 11.6.0-3.el10_0.2, idm-pki-ca 11.6.0-3.el10_0.2, idm-pki-kra 11.6.0-3.el10_0.2, idm-pki-acme 11.6.0-3.el10_0.2, idm-pki-base 11.6.0-3.el10_0.2, idm-pki-java 11.6.0-3.el10_0.2, +3 more
    fixed: vendor fix RHSA-2026:95466
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) resteasy 3.0.26-20.el9_6.2, pki-resteasy-core 3.0.26-20.el9_6.2, pki-resteasy-client 3.0.26-20.el9_6.2, pki-resteasy-jackson2-provider 3.0.26-20.el9_6.2, pki-resteasy-servlet-initializer 3.0.26-20.el9_6.2
    fixed: vendor fix RHSA-2026:95504
  • Red Hat JBoss Enterprise Application Platform 8.1
    fixed: vendor fix RHSA-2026:95221
  • Red Hat Build of Apache Camel 3.33.4.redhat jimfs 1.1, jna 5.8.0, bcel 6.7.0, gax 2.74.1, icu4j 78.2, joni 2.2.6, +1616 more Red Hat build of Quarkus 3.27.6.redhat jna 5.8.0, db2 1.21.4, h2 2.3.230, y18n 5.0.8, cliui 8.0.1, guice 5.1.0, +1009 more Red Hat build of Quarkus 3.33.4.redhat jna 5.8.0, h2 2.4.240, y18n 5.0.8, cliui 8.0.1, guice 5.1.0, wasm 2.15.3, +1016 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 jss, pki-ca, idm-jss, ldapjdk, pki-kra, pki-acme, +25 more
    not affected: component not present
  • Red Hat Enterprise Linux 9 pki-ca, pki-kra, pki-acme, pki-base, pki-core, pki-tools, +16 more
    not affected: vulnerable code not present
  • Red Hat Satellite 6 candlepin, candlepin-selinux
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/resteasy/resteasy/security/advisories/GHSA-972r-f3fv-whm3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Affected products

  • Red Hat RESTEasy
  • Red Hat Red Hat Build of Apache Camel 3.33.4.redhat
  • Red Hat Red Hat build of Quarkus 3.27.6.redhat
  • Red Hat Red Hat build of Quarkus 3.33.4.redhat
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1
  • Red Hat Red Hat build of Apache Camel 4 for Quarkus 3
  • Red Hat Red Hat build of Apicurio Registry 3
  • Red Hat Red Hat build of Debezium 3
  • Red Hat Red Hat Build of Keycloak
  • Red Hat Red Hat Certificate System 10
  • Red Hat Red Hat Certificate System 11
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 7
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat Satellite 6
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness
  • CWE-346 Origin Validation Error
  • CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of resteasy/resteasy published their own advisory on GitHub. Reviewed sources take precedence over it.