Answer in brief
CVE-2026-54513 records a High severity (CVSS 8.1) vulnerability in jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray). The current sources do not mark it as known exploited. The current feed maps FasterXML/jackson-databind (generic), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-54513 records a High severity (CVSS 8.1) vulnerability in jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray). The current sources do not mark it as known exploited. The current feed maps FasterXML/jackson-databind (generic), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps FasterXML/jackson-databind (generic), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| FasterXML/jackson-databindgeneric | >= 2.10.0, < 2.18.8 || >= 2.19.0, < 2.21.4 || >= 3.0.0, < 3.1.4 | Not reported |
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.10.0,<2.18.8 | 2.18.8 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.19.0,<2.21.4 | 2.21.4 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
| tools.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
Published upstream
Jun 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps FasterXML/jackson-databind (generic), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven), com.fasterxml.jackson.core:jackson-databind (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| FasterXML/jackson-databindgeneric | >= 2.10.0, < 2.18.8 || >= 2.19.0, < 2.21.4 || >= 3.0.0, < 3.1.4 | Not reported |
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.10.0,<2.18.8 | 2.18.8 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=2.19.0,<2.21.4 | 2.21.4 |
| com.fasterxml.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
| tools.jackson.core:jackson-databindmaven | >=3.0.0,<3.1.4 | 3.1.4 |
Published upstream
Jun 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
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.
Quoted source text, attributed separately from HOL analysis.