Vulnerability · CVE-2026-110879

jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared

Q: Which versions are affected?

Compare what you have installed with 2.14.0+ds-1, 2.14.0+ds-2, 2.14.0+ds-3, 0 → 2.22.4-1, >= 2.10.0, = 2.19.0, = 2.22.0, = 3.0.0, <= 3.1.7. Compare the installed version with the linked vendor advisory before you change production.

Q: What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 1.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Published Oct 28, 2026 · catalog updated Oct 28, 2026 · jackson-databind validates the outer

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-110879. EPSS is 1.20%. Act only if a listed version of jackson-databind validates the outer is installed.

Gaps on this record

The stored product name is a package slug. The name on this page is taken from the title (jackson-databind validates the outer).
No vendor fix or required action is stored. Compare the linked advisory before you change production.

Severity: Critical9.8
Known exploitation: Not in CISA/VulnCheck KEV
EPSS: 1.20%
Remediation: Version ranges on file
Affected products: Debian:12 jackson-databind · Debian:14 jackson-databind · maven com.fasterxml.jackson.core:jackson-databind · maven tools.jackson.core:jackson-databind · package maven

jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added for CVE-2026-54512 (GHSA-j3rv-43j4-c7qm), of which this is an incomplete fix. DatabindContext._resolveAndValidateGeneric() checks the outer class against the declared base type and then passes each argument from the type ID to _validateTypeParameter(), which validates the argument against the outer base type rather than enforcing its corresponding declared generic binding. It also invokes validators with arguments that have not passed the subtype check those validators expect. Under the default DefaultBaseTypeLimitingValidator this accepts an unrelated class inside a generic subtype even when the same class is rejected as a direct type ID. Where an allowIfBaseType(...) rule approves the outer type, Jackson substitutes LaissezFaireSubTypeValidator, so the configured validator no longer restricts the embedded arguments. The element type of a plain array type ID such as [Lpkg.Gadget; is likewise left unvalidated once the array's base type is approved. Affected paths include annotation-based class-name polymorphism with a default Jackson 3.x JsonMapper, configured default typing in both Jackson 2.x and 3.x, and integrations that expose that default typing. The default-validator case requires no application-authored validator: with @JsonTypeInfo(use = Id.CLASS), a direct gadget type ID is rejected as "Not a subtype", while a type ID naming a generic wrapper around the same gadget is accepted and deserialized, including attacker-supplied bean properties. Where class-name default typing permits Map, a property declared as Map accepts HashMap ; map-key discovery then passes the attacker-controlled JSON property name to the selected class's one-string constructor. With Spring on the classpath and attac

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

Debian:12 jackson-databind2.14.0+ds-1, 2.14.0+ds-2, 2.14.0+ds-3
Debian:14 jackson-databind0 → 2.22.4-1
maven com.fasterxml.jackson.core:jackson-databind>= 2.10.0, <= 2.18.11
maven com.fasterxml.jackson.core:jackson-databind>= 2.19.0, <= 2.21.7
maven com.fasterxml.jackson.core:jackson-databind>= 2.22.0, <= 2.22.3
maven tools.jackson.core:jackson-databind>= 3.0.0, <= 3.1.7
maven tools.jackson.core:jackson-databind>= 3.2.0, <= 3.2.3
package mavenversion unspecified

How to fix CVE-2026-110879

Upgrade
CVE-2026-110879 lists a fix boundary at 2.22.4-1. Compare the installed build with that boundary before you change production.
Version check
Affected <= 2.18.11
Advisory
Open the bsi record and follow its fix.
Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-110879. EPSS is 1.20%. Act only if a listed version of jackson-databind validates the outer is installed.

Which versions are affected?

Compare what you have installed with 2.14.0+ds-1, 2.14.0+ds-2, 2.14.0+ds-3, 0 → 2.22.4-1, >= 2.10.0, <= 2.18.11, >= 2.19.0, <= 2.21.7, >= 2.22.0, <= 2.22.3, >= 3.0.0, <= 3.1.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 1.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security Jackson security

Code

The project this record applies to. Exploit listings stay in References.

com.fasterxml.jackson.core:jackson-databind · central.sonatype.com

Timeline

Detection, updates, and resolution for this record.

Oct 28, 2026 · Trivy Vulnerability DB
Detected
jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added for CVE-2026-54512 (GHSA-j3rv-43j4-c7qm), of which this is an incomplete fix. DatabindContext._resolveAndValidateGeneric()
Oct 28, 2026 · Trivy Vulnerability DB
Fix available
jackson-databind fixed in 2.22.4-1
Oct 28, 2026 · Trivy Vulnerability DB
Fix available
jackson-databind fixed in 2.22.4-1
Oct 28, 2026 · Trivy Vulnerability DB
Updated
jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added for CVE-2026-54512 (GHSA-j3rv-43j4-c7qm), of which this is an incomplete fix. DatabindContext._resolveAndValidateGeneric()

Sources

BSI CERT-BundGovernment advisoryCVE-2026-110879
Red Hat Enterprise Linux (libXi, libXrender, ansible-collection-redhat-leapp) und Red Hat Build of Apache Camel for Quarkus: Mehrere Schwachstellen
wid.cert-bund.de
CVE.orgVulnerability recordCVE-2026-110879
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2026-110879
30-day exploitation probability 1.20%
first.org
Maintainer security tabsVendor advisoryGHSA-m8xf-2cr7-77ph
### Summary Jackson checks the outer class in a class-name type ID but accepts attacker-selected classes inside its generic arguments even when they violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added for [CVE-2026-54512](https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-j3rv-43j4-c7qm). The affected paths incl
github.com
Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-COMFASTERXMLJACKSONCORE-21761837
Deserialization of Untrusted Data
security.snyk.io
Snyk Vulnerability DatabasePackage advisorySNYK-JAVA-TOOLSJACKSONCORE-21761838
Deserialization of Untrusted Data
security.snyk.io
Tenable CVE DatabaseVulnerability recordCVE-2026-110879
jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added for CVE-2026-54512 (GHSA-j3rv-43j4-c7qm), of which this is an incomplete fix. DatabindContext._resolveAndValidateGeneric()
tenable.com
Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-110879
jackson-databind validates the outer class of a class-name type ID but accepts attacker-selected classes inside its generic arguments, even when those classes violate the declared type or would be rejected as direct type IDs. This bypasses the generic-argument validation added fo
osv.dev

References

ADVISORY · security-tracker.debian.org

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

FIRST EPSSNov 3, 2026
Maintainer security tabsNov 2, 2026
BSI CERT-BundOct 31, 2026
Snyk Vulnerability DatabaseOct 30, 2026
Snyk Vulnerability DatabaseOct 30, 2026
Tenable CVE DatabaseOct 28, 2026
CVE.orgOct 28, 2026
Trivy Vulnerability DBOct 28, 2026

Priority score

31/100

Evidence confidence: High

A vendor or government advisory agrees with at least one other source.

Confirmed exploitation0/30
EPSS probability1/20
CVSS severity15/15
Public exploit0/10
Internet exposure10/10
Product prevalence5/5
Detection0/5
Threat research0/5

Decision signals

Four separate signals — do not infer one from another.

Critical

CVSS severity
9.8 v3.1
Technical impact. Separate from exploitation likelihood.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS probability
1.20% · p67.98%
Estimated probability of exploitation within 30 days (FIRST).
Known exploitation
No verified KEV listing
Evidence from CISA KEV or VulnCheck KEV only — not from EPSS alone.
Patch availability
Version ranges on file
Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.

Stacks

Apache Debian Debian 12 Debian 14 Jackson Linux Maven Red Hat

Weakness

CWE-502
Deserialization of Untrusted Data
MITRE definition

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