[GHSA-5jmj-h7xm-6q6v] jackson-databind has case-insensitive deserialization bypasses per-property @JsonIgnoreProperties

advisories/github-reviewed/2026/06/GHSA-5jmj-h7xm-6q6v/GHSA-5jmj-h7xm-6q6v.json

@@ -1,13 +1,13 @@
 {
   "schema_version": "1.4.0",
   "id": "GHSA-5jmj-h7xm-6q6v",
-  "modified": "2026-06-23T21:23:58Z",
+  "modified": "2026-06-23T21:23:59Z",
   "published": "2026-06-23T21:23:58Z",
   "aliases": [
     "CVE-2026-54515"
   ],
   "summary": "jackson-databind has case-insensitive deserialization bypasses per-property @JsonIgnoreProperties",
-  "details": "## Summary\nIn `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.\n\n## Impact\nAn 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).\n\n## Affected / Patched\nFixed in 2.18.9, 2.21.5 and 3.1.4.\n\n## Severity / CWE\nMaintainer: minor. Reporter: Moderate. CWE-915.\n\n## Upstream fix\nFasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.",
+  "details": "## Summary\nIn `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.\n\n## Impact\nAn 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).\n\n## Affected / Patched\nFixed in 2.18.9, 2.21.5, 2.22.1 and 3.1.4.\n\n## Severity / CWE\nMaintainer: minor. Reporter: Moderate. CWE-915.\n\n## Upstream fix\nFasterXML/jackson-databind#5962 (PR #5964, `0e1b0b2`), milestone 3.1.4. Released 2026-06-04.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.",
   "severity": [
     {
       "type": "CVSS_V3",
@@ -25,10 +25,10 @@
           "type": "ECOSYSTEM",
           "events": [
             {
-              "introduced": "3.1.0"
+              "introduced": "2.22.0"
             },
             {
-              "fixed": "3.1.4"
+              "fixed": "2.22.1"
             }
           ]
         }