FreeBSD : jackson-databind -- type parameters bypass the polymorphic type validator (8c1b47e2-cf3d-11f1-a655-3497f65b111b)

critical Nessus Plugin ID 370449

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 8c1b47e2-cf3d-11f1-a655-3497f65b111b advisory.

The Jackson project reports:
Type parameters of generic type ids, and element types of array type ids, were not passed to the configured PolymorphicTypeValidator, so a deny-listed type could be reached through a type parameter.
They are now validated like direct type ids. Approval by base type only covers subtypes of that base type, allowIfSubTypeIsArray() no longer accepts abstract or interface element types without allow-listing, and approval of an array type covers its element type only when given as exactly that class.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 370449

File Name: freebsd_pkg_8c1b47e2cf3d11f1a6553497f65b111b.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 10/22/2026

Updated: 10/22/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

Percentile: 57.86

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2026-110879

CVSS v3

Risk Factor: Critical

Base Score: 9.4

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:jackson-databind

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 10/22/2026

Vulnerability Publication Date: 10/22/2026

Reference Information

CVE: CVE-2026-110879

Detections

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