EUVD-2026-82735Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Remote unauthenticated request to an image-consuming endpoint triggers unbounded allocation with no user interaction; impact is availability-only, matching A:H with C:N/I:N.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
4DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
A remote, unauthenticated attacker can exhaust the JVM heap and cause a denial of service by sending a small crafted image to any RESTEasy (JAX-RS) endpoint that consumes an image request body, because the framework's IIOImageProvider decodes the image through ImageIO without validating declared dimensions or pixel count. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) confirms a clean, low-complexity, availability-only flaw with no confidentiality or integrity impact, consistent with CWE-409 data amplification. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the target application expose a RESTEasy (JAX-RS) endpoint that accepts an image request body deserialized via IIOImageProvider (i.e., a resource method consuming an image content type such as image/*). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) describes a cleanly remote, unauthenticated, low-complexity denial-of-service with no confidentiality or integrity impact - availability-only, which is internally consistent with CWE-409 (data amplification / improper handling of highly compressed data). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified in the available data at time of analysis; the Red Hat advisory (https://access.redhat.com/security/cve/CVE-2026-89059), the tracking Bugzilla entry (https://bugzilla.redhat.com/show_bug.cgi?id=2519756), and the upstream GitHub security advisory (https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2) are the sources to monitor for fixed RESTEasy and product-specific versions. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all RESTEasy-based services and identify any JAX-RS resource methods that consume image content types through the IIOImageProvider; restrict access to these endpoints where possible and enable heap monitoring and alerts. …
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External POC / Exploit Code
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