vulnerability / NVI-00016222 / Revision 1
jackson-databind has case-insensitive deserialization bypasses per-property @JsonIgnoreProperties
GitHub lists this reviewed advisory for com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind, com.fasterxml.jackson.core:jackson-databind, com.fasterxml.jackson.core:jackson-databind, com.fasterxml.jackson.core:jackson-databind. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.3 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
com.fasterxml.jackson.core:jackson-databind
source listed>= 3.1.0, < 3.1.4
## Summary In `BeanDeserializerBase.createContextual()`, per-property `@JsonIgnoreProperties` exclusions are applied by `_handleByNameInclusion()`, producing a `contextual` deserializer whose `BeanPropertyMap` has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by `@JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)`) rebuilds from `this._beanProperties` (the original, unfiltered map) instead of `contextual._beanProperties`, then overwrites the filtered map — restoring every property `_handleByNameInclusion` had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property `@JsonIgnoreProperties` to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4. ## Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915. ## Upstream fix FasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.
tools.jackson.core:jackson-databind
source listed>= 3.1.0, < 3.1.4
## Summary In `BeanDeserializerBase.createContextual()`, per-property `@JsonIgnoreProperties` exclusions are applied by `_handleByNameInclusion()`, producing a `contextual` deserializer whose `BeanPropertyMap` has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by `@JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)`) rebuilds from `this._beanProperties` (the original, unfiltered map) instead of `contextual._beanProperties`, then overwrites the filtered map — restoring every property `_handleByNameInclusion` had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property `@JsonIgnoreProperties` to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4. ## Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915. ## Upstream fix FasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.
com.fasterxml.jackson.core:jackson-databind
source listed>= 2.8.0, < 2.18.9
## Summary In `BeanDeserializerBase.createContextual()`, per-property `@JsonIgnoreProperties` exclusions are applied by `_handleByNameInclusion()`, producing a `contextual` deserializer whose `BeanPropertyMap` has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by `@JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)`) rebuilds from `this._beanProperties` (the original, unfiltered map) instead of `contextual._beanProperties`, then overwrites the filtered map — restoring every property `_handleByNameInclusion` had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property `@JsonIgnoreProperties` to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4. ## Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915. ## Upstream fix FasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.
com.fasterxml.jackson.core:jackson-databind
source listed>= 2.19.0, < 2.21.5
## Summary In `BeanDeserializerBase.createContextual()`, per-property `@JsonIgnoreProperties` exclusions are applied by `_handleByNameInclusion()`, producing a `contextual` deserializer whose `BeanPropertyMap` has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by `@JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)`) rebuilds from `this._beanProperties` (the original, unfiltered map) instead of `contextual._beanProperties`, then overwrites the filtered map — restoring every property `_handleByNameInclusion` had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property `@JsonIgnoreProperties` to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4. ## Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915. ## Upstream fix FasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.
com.fasterxml.jackson.core:jackson-databind
source listed>= 2.22.0, < 2.22.1
## Summary In `BeanDeserializerBase.createContextual()`, per-property `@JsonIgnoreProperties` exclusions are applied by `_handleByNameInclusion()`, producing a `contextual` deserializer whose `BeanPropertyMap` has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by `@JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES)`) rebuilds from `this._beanProperties` (the original, unfiltered map) instead of `contextual._beanProperties`, then overwrites the filtered map — restoring every property `_handleByNameInclusion` had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property `@JsonIgnoreProperties` to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched Will be fixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4. ## Severity / CWE Maintainer: minor. Reporter: Moderate. CWE-915. ## Upstream fix FasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-5jmj-h7xm-6q6v ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.