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Vulnerabilities

Security fix · CVE-2026-54515

Case-insensitive deserialization bypasses per-property @JsonIgnoreProperties in jackson-databind

Published Jun 16, 2026 · catalog updated Jun 24, 2026 · Case-insensitive deserialization bypasses per-property

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-54515. EPSS is 0.44%. Act only if a listed version of Case-insensitive deserialization bypasses per-property is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Case-insensitive deserialization bypasses per-property).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Version ranges on file
Affected products
maven com.fasterxml.jackson.core:jackson-databind · maven tools.jackson.core:jackson-databind

## Summary In , per-property exclusions are applied by , producing a deserializer whose has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by ) rebuilds from (the original, unfiltered map) instead of , then overwrites the filtered map — restoring every property had just removed. The ignored property becomes writable again. ## Impact An application that both enables case-insensitive matching and relies on per-property to keep a field unwritable can have that field set from untrusted JSON (mass-assignment-style write). ## Affected / Patched 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, ), milestone 3.1.4. Released 2026-06-04. ## Credits Omkhar Arasaratnam (@omkhar) - finder.

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.

  • maven com.fasterxml.jackson.core:jackson-databind>= 2.19.0, < 2.21.5
  • maven com.fasterxml.jackson.core:jackson-databind>= 2.22.0, < 2.22.1
  • maven com.fasterxml.jackson.core:jackson-databind>= 2.8.0, < 2.18.9
  • maven tools.jackson.core:jackson-databind>= 3.1.0, < 3.1.4

How to fix CVE-2026-54515

  • Upgrade

    CVE-2026-54515 lists a fix boundary at 2.21.5. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 2.21.5

  • Advisory

    Open the inventory_github 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-2026-54515. EPSS is 0.44%. Act only if a listed version of Case-insensitive deserialization bypasses per-property is installed.

Which versions are affected?

Compare what you have installed with >= 2.19.0, < 2.21.5, >= 2.22.0, < 2.22.1, >= 2.8.0, < 2.18.9, >= 3.1.0, < 3.1.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Jackson security

Code

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

Timeline

Detection, updates, and resolution for this record.

  1. Jun 16, 2026 · Maintainer security tabs

    Detected

    ## Summary In , per-property exclusions are applied by , producing a deserializer whose has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by ) rebuilds from (the original, unfiltered map) instead of , then overwrites the filtered map — restoring every property had just removed. The ignored property becomes writable again. ## Impact An application t

  2. Jun 24, 2026 · Maintainer security tabs

    Updated

    ## Summary In , per-property exclusions are applied by , producing a deserializer whose has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by ) rebuilds from (the original, unfiltered map) instead of , then overwrites the filtered map — restoring every property had just removed. The ignored property becomes writable again. ## Impact An application t

Sources

  • Maintainer security tabsVendor advisoryGHSA-5jmj-h7xm-6q6v

    ## Summary In , per-property exclusions are applied by , producing a deserializer whose has the ignored properties removed. The subsequent per-property case-insensitivity block (triggered by ) rebuilds from (the original, unfiltered map) instead of , then overwrites the filtered map — restoring every property had just removed. The ignored property becomes writable again. ## Impact An application t

    github.com

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 2, 2026