A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either…

Description

A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSON endpoint and the service has the p6spy (3.8.6) jar in the classpath, and an attacker can find an RMI service endpoint to access, it is possible to make the service execute a malicious payload. This issue exists because of com.p6spy.engine.spy.P6DataSource mishandling.

Scores

EPSS (exploitation in 30 days)

4.7% · top 8.1% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

• n/a
• CWE-502 Deserialization of Untrusted Data (opens in a new tab)All about CWE-502 and its CVEs

Affected products

• n/a

  • affected n/a

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavencom.fasterxml.jackson.core:jackson-databindGHSA-fmmc-742q-jg75 (opens in a new tab)

References (26)

• [debian-lts-announce] 20191002 [SECURITY] [DLA 1943-1] jackson-databind security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• DSA-4542 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• 20191007 [SECURITY] [DSA 4542-1] jackson-databind security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• FEDORA-2019-b171554877 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• [drill-dev] 20191017 Dependencies used by Drill contain known vulnerabilities (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [drill-dev] 20191021 [jira] [Created] (DRILL-7416) Updates required to dependencies to resolve potential security vulnerabilities (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [drill-issues] 20191021 [jira] [Created] (DRILL-7416) Updates required to dependencies to resolve potential security vulnerabilities (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• FEDORA-2019-cf87377f5f (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• [iceberg-issues] 20191027 [GitHub] [incubator-iceberg] rdsr commented on issue #535: Update Jackson to 2.9.10 for CVE-2019-14379 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [iceberg-commits] 20191028 [incubator-iceberg] branch master updated: Update Jackson to 2.10.0 for CVE-2019-16943 (#583) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [druid-commits] 20200115 [druid] branch 0.17.0 updated: Suppress CVE-2019-20330 for htrace-core-4.0.1 (#9189) (#9191) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2020:0164 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2020:0159 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2020:0160 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2020:0161 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2020:0445 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://medium.com/%40cowtowncoder/on-jackson-cves-dont-panic-here-is-what-you-need-to-know-54cd0d6e8062 (opens in a new tab)x_refsource_MISCx_transferred
• https://www.oracle.com/security-alerts/cpuapr2020.html (opens in a new tab)x_refsource_MISCx_transferred
• https://www.oracle.com/security-alerts/cpujul2020.html (opens in a new tab)x_refsource_MISCx_transferred
• https://www.oracle.com/security-alerts/cpujan2020.html (opens in a new tab)x_refsource_MISCx_transferred
• https://github.com/FasterXML/jackson-databind/issues/2478 (opens in a new tab)x_refsource_MISCx_transferred
• https://security.netapp.com/advisory/ntap-20191017-0006/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• [bookkeeper-issues] 20200729 [GitHub] [bookkeeper] padma81 opened a new issue #2387: Security vulnerabilities in the apache/bookkeeper-4.9.2 image (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [geode-issues] 20200831 [jira] [Created] (GEODE-8471) Dependency security issues in geode-core-1.12 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://www.oracle.com/security-alerts/cpuoct2020.html (opens in a new tab)x_refsource_MISCx_transferred
• https://www.oracle.com//security-alerts/cpujul2021.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-fmmc-742q-jg75 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-16943](https://trackcve.app/badge/CVE-2019-16943.svg)](https://trackcve.app/cve/CVE-2019-16943)

Record last updated 7 Oct 2026, 20:05 UTC.