20260629005 - FasterXML jackson-databind bypass vulnerability¶
Overview¶
The WASOC has been made aware of a vulnerability affecting FasterXML jackson-databind.
The vulnerability allows an attacker to bypass the PolymorphicTypeValidator (PTV) allow-list when deserialising polymorphic types with generic parameters. Successful exploitation may allow arbitrary classes to be instantiated during deserialisation and could result in arbitrary code execution in vulnerable applications.
What is vulnerable?¶
| Product(s) Affected | Version(s) | CVE | CVSS | Severity |
|---|---|---|---|---|
| FasterXML jackson-databind | 2.10.0 - 2.18.7 2.19.0 - 2.21.3 3.0.0 - 3.1.3 |
CVE-2026-54512 | 8.1 | High |
What has been observed?¶
The WASOC has not received any reports of exploitation of this vulnerability on Western Australian Government networks at the time of writing.
Recommendation¶
The WASOC recommends administrators apply the solutions as per vendor instructions to all affected devices within expected timeframes (refer Patch Management):