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CVE-2026-89059 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=2519756	CISA-ADP
https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2	CISA-ADP
https://access.redhat.com/security/cve/CVE-2026-89059	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2519756	[email protected]
https://github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb	[email protected]
https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-409	Improper Handling of Highly Compressed Data (Data Amplification)	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 18, 2026	CVE Modified	CISA-ADP
Sep 18, 2026	CVE Modified	[email protected]
Sep 18, 2026	New CVE Received	[email protected]