Critical Java/Spring Unsafe Deserialization Remote Code Execution (CVE-2026-19882)
Executive & SecOps Summary
SECOPS ASSESSMENTJava & Spring Boot backend services pulling vulnerable serialization libraries directly or transitively via Maven/Gradle
Unauthenticated attackers can trigger arbitrary bytecode execution through crafted polymorphic JSON/XML payloads
Scan your dependency tree for transitive inclusions and pin the patched release in pom.xml or build.gradle
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Audit Transitive Dependencies & Upgrade Run a dependency tree check across your repositories:
# Maven
mvn dependency:tree | grep -i "serialization"
# Gradle
./gradlew dependencies --configuration runtimeClasspath | grep -i "serialization"2. JVM Runtime Mitigation Flag If you cannot redeploy immediately, restrict deserialization classes via JVM flags:
JAVA_OPTS="-Dcom.sun.jndi.rmi.object.trustURLCodebase=false -Djdk.serialFilter=!*"Scan Your Repositories for Transitive Vulnerable Dependencies in 30 Seconds
Automatically detect vulnerable packages across npm, PyPI, Maven, and Go, and open automated fix Pull Requests without breaking your build.
Technical Root Cause & Exploitation Mechanics
Root Cause Analysis (CWE-502) Improper validation of polymorphic type identifiers during deserialization allows attackers to instantiate arbitrary gadget classes present on the application classpath.
- Even if your code does not explicitly invoke the vulnerable parser, third-party SDKs often pull it in as a transitive dependency.
- Public PoC payloads leverage standard JDK classes to achieve instant command execution.
Official Vendor Advisories & References
Unsafe deserialization of untrusted data in XML/JSON message converter components allows remote attackers to execute arbitrary bytecode via crafted gadget chains.
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