Live › vulnerability › CVE-2026-87293
Go to dashboardA flaw in the RMI component of Oracle Java SE 8 (build 8u503 and the 8u503-perf variant, plus GraalVM Enterprise 21.3.19.1.1) can be exploited by supplying crafted data to its APIs over the network, such as through a web service. A successful attacker gets limited read access and limited update, insert or delete access to data the Java application can reach.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems running Oracle Java SE 8 at 8u503 or 8u503-perf, or GraalVM Enterprise 21.3.19.1.1, that expose RMI-handling APIs to untrusted network input such as web services. The sources say exploitation needs no authentication and no user action, but the attack is difficult to carry out. Teams on other Java versions, or with no network-exposed RMI input, can likely skip it.
No product ranges from the sources yet.
java -version and confirm whether the build is 8u503 or 8u503-perf21.3.19.1.18u503 as published in Oracle's Critical Patch Update21.3.19.1.1Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Vulnerability in Oracle Java SE (component: RMI). Supported versions that are affected are Oracle Java SE: 8u503 and 8u503-perf; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. While the vulnerability is in Oracle Java SE, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N).
This page as .md · .json · in your agent: get_signal("CVE-2026-87293")
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.