---
title: "CVE-2026-89059: RESTEasy - Denial of Service"
description: "RESTEasy contains a denial of service caused by lack of limits on declared image dimensions in IIOImageProvider, letting remote unauthenticated attackers exhaust JVM heap via crafted images."
url: https://panop.io/threat-heartbeat/CVE-2026-89059/
---

# CVE-2026-89059 RESTEasy - Denial of Service

RESTEasy contains a denial of service caused by lack of limits on declared image dimensions in IIOImageProvider, letting remote unauthenticated attackers exhaust JVM heap via crafted images.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.79% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89059)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-409](https://cwe.mitre.org/data/definitions/409.html)

## Vendor fix

Update to the latest version with the fix for image dimension validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89059](https://nvd.nist.gov/vuln/detail/CVE-2026-89059)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2519756](https://bugzilla.redhat.com/show_bug.cgi?id=2519756)
- [https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2](https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2)
- [https://github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb](https://github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb)
- [https://access.redhat.com/security/cve/CVE-2026-89059](https://access.redhat.com/security/cve/CVE-2026-89059)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)