jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.
{
"cwe_ids": [
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59889.json",
"cna_assigner": "GitHub_M"
}{
"extracted_events": [
{
"introduced": "2.18.0"
},
{
"fixed": "2.18.9"
},
{
"introduced": "2.21.0"
},
{
"fixed": "2.21.5"
},
{
"introduced": "2.22.0"
},
{
"fixed": "2.22.1"
},
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.5"
},
{
"introduced": "3.2.0"
},
{
"fixed": "3.2.1"
}
],
"source": [
"AFFECTED_FIELD",
"REFERENCES"
]
}
[
{
"target": {
"file": "src/main/java/com/fasterxml/jackson/databind/deser/impl/UnwrappedPropertyHandler.java",
"function": "processUnwrapped"
},
"deprecated": false,
"digest": {
"function_hash": "38219315850865968457985822492614804225",
"length": 355.0
},
"signature_version": "v1",
"id": "CVE-2026-59889-6fa09bb3",
"source": "https://github.com/fasterxml/jackson-databind/commit/d627a8a86fcb062429282f79f3f256f181ed2c7b",
"signature_type": "Function"
},
{
"target": {
"file": "src/main/java/com/fasterxml/jackson/databind/deser/impl/UnwrappedPropertyHandler.java"
},
"deprecated": false,
"digest": {
"line_hashes": [
"69111130285733665845842448509825191069",
"131745598759607440769632991380110159691",
"227038717324575151299858168555311193390",
"70431490580368147867302567538728532153",
"109037359334413101786264361763256054936",
"39558650246812817006721738270444780294"
],
"threshold": 0.9
},
"signature_version": "v1",
"id": "CVE-2026-59889-7420522f",
"source": "https://github.com/fasterxml/jackson-databind/commit/d627a8a86fcb062429282f79f3f256f181ed2c7b",
"signature_type": "Line"
}
]
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59889.json"
"2026-08-12T15:20:52Z"