EUVD-2026-84533
GHSA-rqpp-92mg-pcvc
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AC:H because exploitation needs a dangerous static-init gadget on the classpath (vendor says none commonly exist); PR:L as controlling the class-name input generally requires connection/config access; impact capped at L/L/L given only static-initializer side effects.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
Lifecycle Timeline
3DescriptionCVE.org
Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Calcite Avatica. Plugin instantiation (via AvaticaUtils#instantiatePlugin and other methods) initializes arbitrary classes via unrestricted calls to Class.forName(String) which by default triggers initialization. This may lead to the execution of static initializer blocks in arbitrary classes present in the classpath. The instantiation APIs should initialize and instantiate only classes implementing the specified plugin interface passed as input in conjunction with the desired classname. At the moment of writing, there are no well-known or widely used classes with dangerous static initializer blocks so the severity is low.
This issue affects Apache Calcite Avatica: before 1.29.0.
Users are recommended to upgrade to version 1.29.0, which fixes the issue.
Articles & Coverage 1
AnalysisAI
Unsafe reflection in Apache Calcite Avatica before 1.29.0 allows an attacker who can influence plugin-instantiation parameters to force the loading and static initialization of arbitrary classes on the server classpath. Exploitation requires low privileges (PR:L per the assessed CVSS vector) and a dangerous static-initializer gadget already present on the classpath; the vendor states no well-known class currently satisfies this, so real-world risk is low despite the RCE tag. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an application built on Apache Calcite Avatica before 1.29.0 that routes externally-controlled input into a plugin-instantiation API (AvaticaUtils#instantiatePlugin or equivalent), allowing the attacker to specify an arbitrary class name. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a low-real-risk issue despite the potential severity implied by the 'RCE' tag. … 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 | Upgrade to Apache Calcite Avatica 1.29.0, which restricts plugin instantiation to classes implementing the specified plugin interface and is the vendor-released patch for this issue. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Oracle Java SE 7 Update 6 and earlier contains multiple sandbox bypass vulnerabilities via the ClassFinder and forName m
Remote code execution in IBM Sterling B2B Integrator, Sterling Integrator, and Tivoli Common Reporting allows unauthenti
Java Runtime Environment sandbox bypass via incorrect image channel verification in 2D component allows remote unauthent
Oracle Java SE JDK/JRE 7 and 6 Update 27 and earlier allows remote code execution with complete system compromise throug
JBoss Seam 2 in Red Hat JBoss EAP 4.3.0 fails to sanitize JBoss Expression Language inputs, allowing remote attackers to
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 update 4 and earlier, 6 up
Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 7 and earlier allow
Remote unauthenticated attackers can execute arbitrary code on Adobe ColdFusion servers through Java deserialization fla
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during
Share
External POC / Exploit Code
Leaving vuln.today