CVE-2019-17564

CRITICAL EXPLOITED IN THE WILD NUCLEI

Apache Dubbo 2.5.0-2.5.9, 2.6.0-2.6.7, 2.7.0-2.7.4 - Remote Code Execution via Unsafe Java Deserialization

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2019-17564 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io). EIP tracks 6 public exploits from researchers including Dor-Tumarkin, fairyming, Jaky5155. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a functional PoC for CVE-2019-17564, demonstrating a deserialization gadget chain in FastJson and Spring Framework to achieve RCE in Apache Dubbo 2.7.3. The gadget chain leverages TemplatesImpl and XString to trigger arbitrary command execution via Runtime.exec().

Description

Unsafe deserialization occurs within a Dubbo application which has HTTP remoting enabled. An attacker may submit a POST request with a Java object in it to completely compromise a Provider instance of Apache Dubbo, if this instance enables HTTP. This issue affected Apache Dubbo 2.7.0 to 2.7.4, 2.6.0 to 2.6.7, and all 2.5.x versions.

Exploits (6)

nomisec WORKING POC 16 stars
by Dor-Tumarkin · poc
https://github.com/Dor-Tumarkin/CVE-2019-17564-FastJson-Gadget

This repository contains a functional PoC for CVE-2019-17564, demonstrating a deserialization gadget chain in FastJson and Spring Framework to achieve RCE in Apache Dubbo 2.7.3. The gadget chain leverages TemplatesImpl and XString to trigger arbitrary command execution via Runtime.exec().

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Apache Dubbo 2.7.3
No auth needed
Prerequisites: Presence of FastJson and Spring Framework dependencies in the target environment
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec WRITEUP 8 stars
by fairyming · poc
https://github.com/fairyming/CVE-2019-17564

This repository provides a detailed technical analysis of CVE-2019-17564, an Apache Dubbo deserialization vulnerability. It includes environment setup instructions, exploitation steps using ysoserial, and mitigation strategies.

Classification
Writeup 90%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Apache Dubbo (2.7.0-2.7.4.1, 2.6.0-2.6.7, 2.5.x)
No auth needed
Prerequisites: Apache Dubbo with HTTP protocol enabled · Presence of gadget chains (e.g., commons-collections4)
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec SUSPICIOUS 2 stars
by Jaky5155 · poc
https://github.com/Jaky5155/CVE-2019-17564

The repository contains no exploit code or technical details, only repeated links to a video. This is characteristic of a social engineering lure rather than a legitimate PoC.

Classification
Suspicious 90%
Attack Type
Deserialization
Complexity
Theoretical
Reliability
Theoretical
Target: Apache Dubbo
No auth needed
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec STUB 1 stars
by Hu3sky · poc
https://github.com/Hu3sky/CVE-2019-17564

The repository contains only a README with minimal information about CVE-2019-17564, lacking any exploit code or technical details. It is a placeholder with no functional content.

Classification
Stub 90%
Attack Type
Deserialization
Complexity
Theoretical
Reliability
Theoretical
Target: Apache Dubbo
No auth needed
Prerequisites: none specified
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec STUB
by Exploit-3389 · poc
https://github.com/Exploit-3389/CVE-2019-17564

The repository contains only a minimal README with no functional exploit code or technical details. It appears to be a placeholder or incomplete submission.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: unknown
No auth needed
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec STUB
by r00t4dm · poc
https://github.com/r00t4dm/CVE-2019-17564

The repository contains only a README with a title and an image reference, lacking any exploit code or technical details. It appears to be a placeholder or incomplete submission.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: unknown
No auth needed
devstral-2 · analyzed Feb 19, 2026 Full analysis →

Nuclei Templates (1)

Apache Dubbo 2.5.x-2.7.4 - Insecure Deserialization
CRITICALVERIFIEDby Khalid6468
FOFA: app="apache-dubbo"

References (2)

Core 2

Scores

CVSS v3 9.8
EPSS 0.3556
EPSS Percentile 98.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

VulnCheck KEV 2024-05-10
InTheWild.io 2024-05-17
CWE
CWE-502
Status published
Products (2)
apache/dubbo 2.5.0 - 2.5.10
org.apache.dubbo/dubbo-rpc-http-invoker 2.5.0 - 2.7.5Maven
Published Apr 01, 2020
Tracked Since Feb 18, 2026