`CVE-2026-54512` jackson-databind

Affected software	jackson-databind
Severity	8.1 High CVSS 3.1
Fixed in	`2.18.8`, `3.1.4`, `2.21.4`
Weakness	Deserialization of untrusted data (CWE-502)
Published	23 Jun 2026
Updated	25 Oct 2026

Description

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

CWE-184

Exploitation status

Proof of concept only

A proof of concept exists, but no reviewed exploit catalogue lists this CVE.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment exploitation: poc CISA recorded that an exploit has been demonstrated. Automatable: no, technical impact: total.
Indexed PoC 1 indexed, none at 5+ stars
EPSS 1.1% chance in 30 days

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

Index	Artifact	Stars	First seen
GitHub PoC	Unofficial Apache Doris Spark connector 26.1.0 security fork for Java / Spark 3.5.1 / Scala 2.12; patched shaded Jackson for CVE-2026-54512.		2026-09-16

Index

Artifact

Stars

First seen

GitHub PoC

Unofficial Apache Doris Spark connector 26.1.0 security fork for Java / Spark 3.5.1 / Scala 2.12; patched shaded Jackson for CVE-2026-54512.

2026-09-16

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: FasterXML/jackson-databind 434d6c5.

Protection none
Action unverified
Review automated Upstream data
Record active

Decided by	Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding	This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.
Candidate fix	https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5 : a commit: the change itself

Decided by

Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

Finding

This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

Candidate fix

https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5 : a commit: the change itself

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update October 2026 ↗	CPU	2026-Q4	Oracle Communications / Third Party (jackson-databind) (25.1.200, 25.2.100, 25.2.200) Oracle Enterprise Manager / Security Framework (jackson-databind) (13.5, 24.1) Oracle Siebel CRM / Siebel Approval Manager (jackson-databind) (17.0-26.8) Oracle Supply Chain / Application Server (jackson-databind) (9.3.6)
Oracle Critical Patch Update July 2026 ↗	CPU	2026-Q3	Oracle Fusion Middleware / NextGen Installer (jackson-databind) (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 14.1.2.1.0, 15.1.1.0.0)
Oracle Critical Security Patch Update September 2026 ↗	CSPU	2026-Q3	Oracle Communications / Core (jackson-databind) (6.1.1-7.0.0) Oracle Siebel CRM / Database Upgrade (jackson-databind) (25.12-26.7) Oracle Siebel CRM / Open Integration (jackson-databind) (25.12-26.7)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update October 2026 ↗

CPU

2026-Q4

Oracle Communications / Third Party (jackson-databind) (25.1.200, 25.2.100, 25.2.200)
Oracle Enterprise Manager / Security Framework (jackson-databind) (13.5, 24.1)
Oracle Siebel CRM / Siebel Approval Manager (jackson-databind) (17.0-26.8)
Oracle Supply Chain / Application Server (jackson-databind) (9.3.6)

Oracle Critical Patch Update July 2026 ↗

CPU

2026-Q3

Oracle Fusion Middleware / NextGen Installer (jackson-databind) (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 14.1.2.1.0, 15.1.1.0.0)

Oracle Critical Security Patch Update September 2026 ↗

CSPU

2026-Q3

Oracle Communications / Core (jackson-databind) (6.1.1-7.0.0)
Oracle Siebel CRM / Database Upgrade (jackson-databind) (25.12-26.7)
Oracle Siebel CRM / Open Integration (jackson-databind) (25.12-26.7)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Communications	Core (jackson-databind)	6.1.1-7.0.0
Oracle Communications	Third Party (jackson-databind)	25.1.200, 25.2.100, 25.2.200	25.1.200 · 25.2.100 · 25.2.200
Oracle Enterprise Manager	Security Framework (jackson-databind)	13.5, 24.1	13.5 · 24.1
Oracle Fusion Middleware	NextGen Installer (jackson-databind)	12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 14.1.2.1.0, 15.1.1.0.0	12.2.1.4.0 · 14.1.1.0.0 · 14.1.2.0.0 · 14.1.2.1.0 · 15.1.1.0.0
Oracle Siebel CRM	Database Upgrade (jackson-databind)	25.12-26.7
Oracle Siebel CRM	Open Integration (jackson-databind)	25.12-26.7
Oracle Siebel CRM	Siebel Approval Manager (jackson-databind)	17.0-26.8
Oracle Supply Chain	Application Server (jackson-databind)	9.3.6	9.3.6

Family

Component

Versions, as Oracle lists them

Read as

Oracle Communications

Core (jackson-databind)

6.1.1-7.0.0

Oracle Communications

Third Party (jackson-databind)

25.1.200, 25.2.100, 25.2.200

25.1.200 · 25.2.100 · 25.2.200

Oracle Enterprise Manager

Security Framework (jackson-databind)

13.5, 24.1

13.5 · 24.1

Oracle Fusion Middleware

NextGen Installer (jackson-databind)

12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 14.1.2.1.0, 15.1.1.0.0

12.2.1.4.0 · 14.1.1.0.0 · 14.1.2.0.0 · 14.1.2.1.0 · 15.1.1.0.0

Oracle Siebel CRM

Database Upgrade (jackson-databind)

25.12-26.7

Oracle Siebel CRM

Open Integration (jackson-databind)

25.12-26.7

Oracle Siebel CRM

Siebel Approval Manager (jackson-databind)

17.0-26.8

Oracle Supply Chain

Application Server (jackson-databind)

9.3.6

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

com.fasterxml.jackson.core:jackson-databind 2.10.0 2.18.8 unbounded

com.fasterxml.jackson.core:jackson-databind 3.0.0 3.1.4 unbounded

com.fasterxml.jackson.core:jackson-databind 2.19.0 2.21.4 unbounded

tools.jackson.core:jackson-databind 3.0.0 3.1.4 unbounded

Package	Introduced	Fixed	Last affected
`com.fasterxml.jackson.core:jackson-databind`	2.10.0	`2.18.8`	unbounded
`com.fasterxml.jackson.core:jackson-databind`	3.0.0	`3.1.4`	unbounded
`com.fasterxml.jackson.core:jackson-databind`	2.19.0	`2.21.4`	unbounded
`tools.jackson.core:jackson-databind`	3.0.0	`3.1.4`	unbounded

Products and versions

3 products, 7 version entries

Source	Vendor	Product	Scheme	Affected versions
osv	com.fasterxml.jackson.core	jackson-databind	generic	≥ 2.10.0 and ＜ 2.18.8 · ≥ 2.19.0 and ＜ 2.21.4 · ≥ 3.0.0 and ＜ 3.1.4
nvd	fasterxml	jackson-databind	generic	≥ 2.10.0 and ＜ 2.18.8 · ≥ 2.19.0 and ＜ 2.21.4 · ≥ 3.0.0 and ＜ 3.1.4
osv	tools.jackson.core	jackson-databind	generic	≥ 3.0.0 and ＜ 3.1.4

Source

Vendor

Product

Scheme

Affected versions

osv

com.fasterxml.jackson.core

jackson-databind

generic

≥ 2.10.0 and ＜ 2.18.8 · ≥ 2.19.0 and ＜ 2.21.4 · ≥ 3.0.0 and ＜ 3.1.4

nvd

fasterxml

jackson-databind

generic

≥ 2.10.0 and ＜ 2.18.8 · ≥ 2.19.0 and ＜ 2.21.4 · ≥ 3.0.0 and ＜ 3.1.4

osv

tools.jackson.core

jackson-databind

generic

≥ 3.0.0 and ＜ 3.1.4

References

URL	Tags
https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5	commit
https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm	WEB
https://github.com/FasterXML/jackson-databind/issues/5988	WEB
https://github.com/FasterXML/jackson-databind	PACKAGE

URL

Timeline

Published	2026-06-23	By the CVE Program.
NVD record modified	2026-10-25	NVD's own last-modified date for this record.

Published

2026-06-23

By the CVE Program.

NVD record modified

2026-10-25

NVD's own last-modified date for this record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint matched Mitigation candidate References include candidate fix URL (commit tier): https://github.com/FasterXML/jackson-databind/commit/434d6c511de7fdd9872f29157aafb6162d12d8d5

18 open-source-maven skipped The affected package being open source on Maven, so the fix can be read

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match withheld CWE-502 names deserialization, but the description identifies an unsupported deserialization library; not promoted by the CWE alone.

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold no match Severity is HIGH — only MEDIUM/LOW are deprioritized

24 no-exploit-published decided it matched No exploit published No exploit code has been published, and an upstream fix path does exist, so the remediation half of the candidacy still holds.

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

fasterxml jackson-databind tracked cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* yaml

NVD ↗ · CVE.org ↗