Is there a public exploit for CVE-2026-89059?

No public exploit for CVE-2026-89059 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-89059?

CVE-2026-89059 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.89%.

What does CVE-2026-89059 affect?

CVE-2026-89059 affects Red Hat Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10, Red Hat build of Quarkus 3.27.6.redhat, Red Hat build of Quarkus 3.33.4.redhat, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 10.0 Extended Update Support.

7.5 High

A flaw was found in RESTEasy's IIOImageProvider, which decodes attacker-supplied image request bodies without enforcing any limit on the…

CVE-2026-89059

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.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.89% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 18 September 2026
Last updated: 5 November 2026
Affected: Red Hat · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat Enterprise Linux 9 · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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