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.
References10
- access.redhat.com/errata/RHSA-2026:83082
- access.redhat.com/errata/RHSA-2026:83520
- access.redhat.com/errata/RHSA-2026:83670
- access.redhat.com/errata/RHSA-2026:85234
- access.redhat.com/errata/RHSA-2026:92408
- access.redhat.com/errata/RHSA-2026:95221
- access.redhat.com/errata/RHSA-2026:95466
- access.redhat.com/errata/RHSA-2026:95504
- access.redhat.com/errata/RHSA-2026:95505
- access.redhat.com/errata/RHSA-2026:95887
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 2% percentile: 75 · as of 8 November 2026
- CWE
- CWE-409
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.