# CVE-2026-89059: Resteasy-core: resteasy: iioimageprovider unbounded image decode (decompression-bomb dos)

Status: published. Published: 2026-09-18. Updated: 2026-11-04.

A flaw was found in RESTEasy's IIOImageProvider, which decodes attacker-supplied image request bodies without enforcing any limit on the declared image dimensions or pixel count. A remote, unauthenticated attacker can send a small crafted image declaring enormous dimensions to trigger a very large memory allocation, exhausting the JVM heap and resulting in a denial of service.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Red Hat /  (RESTEasy): ≥ 0; < 6.2.19.Final (affected, maven); ≥ 7.0.0.Alpha1; < 7.0.5.Final (affected, maven). Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus 3.27.6.redhat (org.jboss.resteasy/resteasy-core): ≥ 6.2.19.Final-redhat-00003; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat build of Quarkus 3.33.4.redhat (org.jboss.resteasy/resteasy-core): ≥ 6.2.19.Final-redhat-00003; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (dogtag-pki): ≥ 0:11.9.0-6.el10_2.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (resteasy): ≥ 0:3.0.26-20.el9_8.1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8.1 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Apicurio Registry 3 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat build of Debezium 3 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Build of Keycloak (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Build of Keycloak (rhbk/keycloak-rhel9-operator): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Certificate System 10 (redhat-pki:10/redhat-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Certificate System 11 (redhat-pki): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (pki-core:10.6/pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (jackson-jaxrs-providers): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (pki-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Fuse 7 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Fuse 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk11-openshift-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk17-openshift-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (jboss-eap-7/eap74-els-openjdk8-openshift-rhel8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform 8 (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack (resteasy-core): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Satellite 6 (candlepin): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Single Sign-On 7 (resteasy-jaxrs): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.89% as of 2026-11-04; percentile 59.55%

- SSVC: exploitation poc; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-409

## Exploit evidence

- exploit: https://bugzilla.redhat.com/show_bug.cgi?id=2519756 (ADP: CISA-ADP)
- exploit: https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2 (ADP: CISA-ADP)

## References

- https://access.redhat.com/errata/RHSA-2026:83082 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:83520 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:85234 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:92408 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:95221 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-89059 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2519756 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb (CNA: redhat)

- https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2 (CNA: redhat)

- https://bugzilla.redhat.com/show_bug.cgi?id=2519756 (ADP: CISA-ADP; exploit)

- https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-89059; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-89059; retrieved 2026-11-04; source updated Not reported

Revision: 72e12f189b234b7cc43be7c50b5b3d04808983aa5d3067fb3b1068cabfc287a1

Canonical: https://y2.dev/cve/CVE-2026-89059

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