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CVE-2026-54513

jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)

CVSS score

8.1

EPSS probability

%1.2

Risk score

0.1

Published

3 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-54513 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-54513 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1fasterxmljackson-databind View
2fasterxmljackson-databind View
3fasterxmljackson-databind View
4fasterxmljackson-databind View
5mavencom.fasterxml.jackson.core:jackson-databind View
6mavencom.fasterxml.jackson.core:jackson-databind View
7mavencom.fasterxml.jackson.core:jackson-databind View
8maventools.jackson.core:jackson-databind View
9maventools.jackson.core:jackson-databind View
10mavencom.fasterxml.jackson.core:jackson-databind View
11mavencom.fasterxml.jackson.core:jackson-databind View
12mavencom.fasterxml.jackson.core:jackson-databind View
13maventools.jackson.core:jackson-databind View
Total affected vendors: 2|Products: 13

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.1CVSS V31HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
8.1CVSS V3_1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVE CNA
8.1CVSS V3_1HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVE ADP
8.1CVSS 3.x—Vector not publishedGitHub Advisory
0.0CVSS 4.0—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

10 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
gitlabmaven/tools.jackson.core/jackson-databind3.1.4

GitLab Advisory düzeltilmiş sürüm: 3.1.4

gitlab

Upgrade to version 3.1.4 or above.

osvcom.fasterxml.jackson.core:jackson-databind2.18.8

OSV düzeltilmiş sürüm: 2.18.8

osvcom.fasterxml.jackson.core:jackson-databind2.21.4

OSV düzeltilmiş sürüm: 2.21.4

osvcom.fasterxml.jackson.core:jackson-databind3.1.4

OSV düzeltilmiş sürüm: 3.1.4

osvtools.jackson.core:jackson-databind3.1.4

OSV düzeltilmiş sürüm: 3.1.4

canonical

Upgrade to version 3.1.4 or above.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-54513 is associated with the following CWEs:

CWE-184: Common Weakness Enumeration Entry CWE-184CWE-937: Common Weakness Enumeration Entry CWE-937CWE-1035: Common Weakness Enumeration Entry CWE-1035

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-54513 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9fvendor-advisoryhttps://github.com/FasterXML/jackson-databind/issues/5981vendor-advisoryhttps://github.com/FasterXML/jackson-databind/issues/5983vendor-advisoryhttps://github.com/FasterXML/jackson-databind/pull/5984vendor-advisoryhttps://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5vendor-advisoryhttps://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8evendor-advisoryhttps://access.redhat.com/errata/RHSA-2026:36839nvdhttps://access.redhat.com/errata/RHSA-2026:40895nvdhttps://access.redhat.com/errata/RHSA-2026:41951nvdhttps://access.redhat.com/errata/RHSA-2026:43218nvd

CVSS Vector Radar Chart

8.1 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

10 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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Weakness Type (CWE & CAPEC)

CWE-184 CWE-937 CWE-1035

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