CVE-2026-22016

HIGH

Oracle Java SE and GraalVM - Unauthorized Data Access

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-22016. PoCs published by George0Papasotiriou.

AI-analyzed exploit summary This PoC demonstrates a content spoofing vulnerability in IPFS by exploiting improper multihash length validation in CIDs. It generates a spoofed CID where the truncated hash of malicious content matches the prefix of a legitimate file's hash, potentially tricking IPFS nodes into serving the wrong content.

Description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAXP). Supported versions that are affected are Oracle Java SE: 8u481, 8u481-b50, 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Exploits (1)

github WORKING POC
by George0Papasotiriou · pythonpoc
https://github.com/George0Papasotiriou/CVE-2026-22016-IPFS-CID-Spoofing-via-Multihash-Length-Extension

This PoC demonstrates a content spoofing vulnerability in IPFS by exploiting improper multihash length validation in CIDs. It generates a spoofed CID where the truncated hash of malicious content matches the prefix of a legitimate file's hash, potentially tricking IPFS nodes into serving the wrong content.

Classification
Working Poc 98%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: IPFS (InterPlanetary File System) implementations vulnerable to multihash length extension spoofing
No auth needed
Prerequisites: IPFS node or gateway that does not validate multihash digest length against the expected hash function output · Python environment with `py-multihash` and `py-cid` libraries
mistral-large-3 · analyzed Aug 04, 2026 Full analysis →

References (23)

Core 23
Core References
Vendor Advisory vendor-advisory
Oracle Advisory
https://www.oracle.com/security-alerts/cpuapr2026.html

Scores

CVSS v3 7.5
EPSS 0.0070
EPSS Percentile 50.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-200 CWE-502 CWE-611
Status published
Products (26)
oracle/graalvm 21.3.17
oracle/graalvm_for_jdk 17.0.18
oracle/graalvm_for_jdk 21.0.10
oracle/jdk 1.8.0 update481 (3 CPE variants)
oracle/jdk 11.0.30
oracle/jdk 17.0.18
oracle/jdk 21.0.10
oracle/jdk 25.0.2
oracle/jdk 26
oracle/jre 1.8.0 update481 (3 CPE variants)
... and 16 more
Published Apr 21, 2026
Tracked Since Apr 22, 2026