Vulnerability in Red Hat

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund19 Oct 2026WID-SEC-2026-4029

  Red Hat Enterprise Linux (python-tornado, resteasy-core, bubblewrap, pgvector): Multiple vulnerabilities Translated from German

  Risk highCVE-2026-89059CVE-2026-82397CVE-2026-87766+3 more CVEs

[ References ]References

• access.redhat.com/errata/RHSA-2026:83082vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:83520vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:85234vendor-advisoryx_refsource_REDHAT
• access.redhat.com/security/cve/CVE-2026-89059vdb-entryx_refsource_REDHAT
• bugzilla.redhat.com/show_bug.cgiissue-trackingx_refsource_REDHAT
• github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb
• github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2