Cyber Resilience

CVE-2026-54513

HighUpdated

Published: 23 June 2026

Published
23 June 2026
Modified
03 July 2026
KEV Added
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Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0068 47.8th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-54513 is a high-severity Incomplete List of Disallowed Inputs (CWE-184) vulnerability in Fasterxml Jackson-Databind. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 47.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-184

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Bypass of polymorphic type validation in Jackson deserialization directly enables remote exploitation of applications using the library via crafted input.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-54512Same product: Fasterxml Jackson-Databind
CVE-2021-46877Same product: Fasterxml Jackson-Databind
CVE-2025-71320Shared CWE-184
CVE-2025-48732Shared CWE-184
CVE-2026-42590Shared CWE-184
CVE-2026-43566Shared CWE-184
CVE-2026-29062Same vendor: Fasterxml
CVE-2026-43532Shared CWE-184
CVE-2026-34415Shared CWE-184
CVE-2026-41361Shared CWE-184

Affected Assets

fasterxml
jackson-databind
2.10.0 — 2.18.8 · 2.19.0 — 2.21.4 · 3.0.0 — 3.1.4

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-8 Spam Protection
addresses: CWE-184

Spam filters rely on evolving blacklists, signatures, and heuristics of disallowed message patterns; keeping them updated per the control directly mitigates incomplete disallowed-input lists.

Hardening callouts derived

Configuration rules from DISA STIG baselines that reduce the attack surface for weaknesses of the type cited by this CVE. Derived transitively via CVE→CWE→STIG over `controls_xwalks` (authoritative rows only).

Oracle Linux 8 (1 rule)
  • V-248691 OL 8 must require the maximum number of repeating characters be limited to three when passwords are changed. via CWE-184

References