High
jackson-databind — security advisory
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
- Products
- jackson-databind
- Affected versions
- 2.10.0-2, 2.10.1-1, 2.10.2-1, 2.12.1-1, 2.12.5-1, 2.13.0-1, 2.13.0-2, 2.14.0+ds-1, 2.14.0+ds-1build1, 2.14.0+ds-2, 2.14.0-1, 2.2.2-1, 2.2.2-1ubuntu0.1~esm1, 2.4.2-2, 2.4.2-3, 2.4.2-3ubuntu0.1~esm1, 2.4.2-3ubuntu0.1~esm2, 2.8.6-1, 2.9.1-1, 2.9.4-1, 2.9.5-1, 2.9.8-1~18.04, 2.9.9.3-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54513
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:45 UTC · Revision 1
Source evidence
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
osv:UBUNTU-CVE-2026-54513
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
jackson-databind
Fixed versions: Not specified
Complete source record
{
"id": "73b9bf9f60f3e61e0fbd33cedaefbcc988337beb2a4031e488571354e012c8e0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-54513",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-54513",
"summary": "jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.",
"evidence": "osv:UBUNTU-CVE-2026-54513",
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"severity": "high",
"structured": {
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"aliases": [
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},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
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"type": "Ubuntu",
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"database_specific": {
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],
"modified": "2026-10-17T12:59:05.923631498Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-54513",
"https://www.cve.org/CVERecord?id=CVE-2026-54513",
"https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f",
"https://github.com/FasterXML/jackson-databind/issues/5981",
"https://github.com/FasterXML/jackson-databind/pull/5983",
"https://github.com/FasterXML/jackson-databind/pull/5984",
"https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5",
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"https://github.com/FasterXML/jackson-databind/issues/5983"
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359284,
"published_at": "2026-06-23T21:17:00+00:00"
}