Bug 2495196

Summary: CVE-2026-54515 jackson-modules-base: jackson-databind: Ignored properties can be unexpectedly modified [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: jackson-modules-baseAssignee: Marco Fargetta <mfargett>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: ckelley, edewata, java-sig-commits, mfargett
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["54a6546b-41b2-4b8e-9762-ab6856caa660"]}
Fixed In Version: jackson-modules-base-2.21.5-1.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-14 20:44:11 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2492016    

Description Jon Moroney 2026-06-30 20:41:36 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.8.0 until 2.18.9, 2.21.5, and 3.1.4, 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. This vulnerability is fixed in 2.18.9, 2.21.5, and 3.1.4.
Comment 1 Fedora Update System 2026-07-14 20:39:11 UTC 
FEDORA-2026-ddde3cf003 (fasterxml-oss-parent-75-1.fc45, jackson-annotations-2.21-6.fc45, and 6 more) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ddde3cf003
Comment 2 Fedora Update System 2026-07-14 20:44:11 UTC 
FEDORA-2026-ddde3cf003 (fasterxml-oss-parent-75-1.fc45, jackson-annotations-2.21-6.fc45, and 6 more) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.