Detections
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SCA: security update for com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind (GHSA-gx83-3vf8-gh7j)
medium Tenable Self-Hosted Container Security Plugin ID 448456
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically whenever
@JsonTypeInfo is used without an explicitly configured custom validator. It denies polymorphic resolution
only for a fixed set of "unsafe base types", and its isSafeSubType method returns true unconditionally for
every base type outside that set. java.lang.Comparable was absent from the list despite being implemented
by a very large fraction of JDK and application classes, comparable in breadth to java.io.Serializable,
which is on the list for that reason. An application declaring an @JsonTypeInfo-annotated property or
class with Comparable as its base type, and no custom PolymorphicTypeValidator, will accept a type
identifier for essentially any class implementing Comparable. This yields an attacker-controlled object
instantiation primitive; a demonstrated case constructs a java.io.File for an arbitrary attacker-chosen
path, which becomes path-traversal-adjacent if the application subsequently calls path-sensitive methods
on the value. No class implementing Comparable has been identified that yields code execution through
deserialization alone. Global Default Typing via activateDefaultTyping is not affected, because that
method structurally requires an explicit PolymorphicTypeValidator argument. This affects
com.fasterxml.jackson.core:jackson-databind from 2.11.0 before 2.18.10, from 2.19.0 before 2.21.6, and
from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0
before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2. (CVE-2026-83557)
Solution
Update the com.fasterxml.jackson.core:jackson-databind library and its related packages to version 2.18.10 or later.See Also
Plugin Details
Severity: Medium
ID: 448456
Version: Revision 1.1
Type: Local
Family: SCA Checks
Published: 9/29/2026
Updated: 9/29/2026
Risk Information
VPR
Risk Factor: Medium
Score: 5.5
Percentile: 95.86
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 5.1
Temporal Score: 3.8
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2026-83557
CVSS v3
Risk Factor: Medium
Base Score: 5.6
Temporal Score: 4.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 9/28/2026
Vulnerability Publication Date: 9/1/2026
Reference Information
CVE: CVE-2026-83557