CVE-2020-8840

CRITICAL

FasterXML Jackson-Databind <2.9.10.2 - RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 9 public exploits for CVE-2020-8840. PoCs published by jas502n, fairyming, Wfzsec.

AI-analyzed exploit summary This repository contains a functional PoC for CVE-2020-8840, a deserialization vulnerability in FasterXML/jackson-databind. The exploit leverages the `JndiConverter` class to trigger an LDAP lookup, potentially leading to remote code execution if an attacker-controlled LDAP server is used.

Description

FasterXML jackson-databind 2.0.0 through 2.9.10.2 lacks certain xbean-reflect/JNDI blocking, as demonstrated by org.apache.xbean.propertyeditor.JndiConverter.

Exploits (9)

nomisec WORKING POC 73 stars
by jas502n · poc
https://github.com/jas502n/jackson-CVE-2020-8840

This repository contains a functional PoC for CVE-2020-8840, a deserialization vulnerability in FasterXML/jackson-databind. The exploit leverages the `JndiConverter` class to trigger an LDAP lookup, potentially leading to remote code execution if an attacker-controlled LDAP server is used.

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: FasterXML/jackson-databind
No auth needed
Prerequisites: Network access to the target · LDAP server controlled by the attacker
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 37 stars
by fairyming · poc
https://github.com/fairyming/CVE-2020-8840

This repository contains a functional PoC for CVE-2020-8840, a JNDI injection vulnerability in FasterXML/jackson-databind. The exploit leverages the `org.apache.xbean.propertyeditor.JndiConverter` class to trigger remote code execution via LDAP.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: FasterXML jackson-databind (2.0.0 <= version <= 2.9.10.2)
No auth needed
Prerequisites: Vulnerable jackson-databind version · LDAP server hosting malicious payload · HTTP server hosting exploit class
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 16 stars
by Wfzsec · poc
https://github.com/Wfzsec/FastJson1.2.62-RCE

This repository contains a functional exploit PoC for CVE-2020-8840, demonstrating a deserialization vulnerability in Fastjson <= 1.2.62. The PoC leverages the JndiConverter class to trigger a JNDI lookup, potentially leading to remote code execution.

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Trivial
Reliability
Reliable
Target: Fastjson <= 1.2.62
No auth needed
Prerequisites: Fastjson <= 1.2.62 with AutoTypeSupport enabled · Access to a vulnerable endpoint processing JSON input
devstral-2 · analyzed Feb 18, 2026 Full analysis →
github WORKING POC 5 stars
by JAckLosingHeart · javapoc
https://github.com/JAckLosingHeart/CVE-PoC-Collection/tree/main/jackson-CVE-2020-8840

This repository contains a functional PoC for CVE-2020-8840, a deserialization vulnerability in Jackson Databind. The exploit leverages the `JndiConverter` class to trigger an LDAP connection to a malicious server, leading to arbitrary code execution via the `Evil` class.

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Jackson Databind (versions affected by CVE-2020-8840)
No auth needed
Prerequisites: LDAP server hosting the malicious payload · Jackson Databind with default typing enabled
devstral-2 · analyzed Feb 27, 2026 Full analysis →
nomisec WORKING POC 4 stars
by Veraxy00 · poc
https://github.com/Veraxy00/CVE-2020-8840

This repository contains functional exploit code for CVE-2020-8840, demonstrating remote code execution via JNDI injection in Jackson-databind and Fastjson. It includes payloads, an evil class, and instructions for setting up LDAP and HTTP servers to trigger the vulnerability.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: FasterXML jackson-databind (2.0.0 <= version <= 2.9.10.2), Fastjson (<= 1.2.62)
No auth needed
Prerequisites: LDAP server with malicious class · HTTP server hosting the malicious class · Target application using vulnerable Jackson-databind or Fastjson
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by dpredrag · poc
https://github.com/dpredrag/CVE-2020-8840

This repository contains a functional PoC for CVE-2020-8840, demonstrating deserialization vulnerabilities in Fastjson and Jackson libraries. The exploit leverages JNDI injection via LDAP to execute arbitrary code (e.g., launching Calculator.app).

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Fastjson (1.2.68 and earlier), Jackson (versions with default typing enabled)
No auth needed
Prerequisites: LDAP server hosting malicious payload · Target application using vulnerable Fastjson/Jackson versions
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by Blyth0He · poc
https://github.com/Blyth0He/CVE-2020-8840

This repository contains a functional PoC for CVE-2020-8840, a deserialization vulnerability in Jackson-databind. The exploit leverages JNDI injection via LDAP to achieve remote code execution by deserializing a malicious JSON payload.

Classification
Working Poc 95%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Jackson-databind (versions affected by CVE-2020-8840)
No auth needed
Prerequisites: Java environment with vulnerable Jackson-databind · LDAP server hosting malicious payload · HTTP server to serve the exploit class file
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by dawetmaster · poc
https://github.com/dawetmaster/CVE-2020-8840-jackson-databind-vulnerable

This repository contains a vulnerable version of Jackson Databind (2.9.0) that demonstrates CVE-2020-8840, a deserialization vulnerability. The included source code and build configuration allow for testing and exploitation of the flaw.

Classification
Working Poc 90%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Jackson Databind 2.9.0
No auth needed
Prerequisites: Java environment · vulnerable Jackson Databind version
devstral-2 · analyzed Mar 14, 2026 Full analysis →
nomisec WORKING POC
by andikahilmy · poc
https://github.com/andikahilmy/CVE-2020-8840-jackson-databind-vulnerable

This repository contains a vulnerable version of Jackson Databind (2.9.0) that demonstrates CVE-2020-8840, a deserialization vulnerability. The included source code and build configuration allow for testing and exploitation of the flaw.

Classification
Working Poc 90%
Attack Type
Deserialization
Complexity
Moderate
Reliability
Reliable
Target: Jackson Databind 2.9.0
No auth needed
Prerequisites: Java environment · Jackson Databind 2.9.0
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (44)

Core 44
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/02/msg00020.html
Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuapr2020.html
Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuoct2020.html
Third Party Advisory x_refsource_misc
https://github.com/FasterXML/jackson-databind/issues/2620
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20200327-0002/

Scores

CVSS v3 9.8
EPSS 0.2659
EPSS Percentile 97.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-502
Status published
Products (12)
com.fasterxml.jackson.core/jackson-databind 2.0.0 - 2.6.7.4Maven
debian/debian_linux 8.0
fasterxml/jackson-databind 2.0.0 - 2.7.9.7
huawei/oceanstor_9000_firmware v300r006c20
huawei/oceanstor_9000_firmware v300r006c20spc100
huawei/oceanstor_9000_firmware v300r006c20spc200
huawei/oceanstor_9000_firmware v300r006c20spc300
netapp/oncommand_api_services
netapp/oncommand_workflow_automation
netapp/service_level_manager
... and 2 more
Published Feb 10, 2020
Tracked Since Feb 18, 2026