FasterXML jackson-databind up to 2.13.x ObjectMapper.readTree resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in FasterXML jackson-databind up to 2.13.x. Impacted is the function ObjectMapper.readTree. This manipulation causes resource consumption. This vulnerability is registered as CVE-2026-50193. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in FasterXML jackson-databind up to 2.13.x. Affected by this vulnerability is the function ObjectMapper.readTree. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.13.0 until 2.14.0, a potential Denial-of-Service exists when attacker sends deeply nested JSON if (and only if) the service reads deeply nested (1000s of levels) JSON as JsonNode (ObjectMapper.readTree()) and writes out same (or modifided) node using JsonNode.toString(). This can consume significant amount of resources with concurrent relatively small requests (1000 nested arrays is 2kB). This vulnerability is fixed in 2.14.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-50193 since 06/04/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 2.14.0 eliminates this vulnerability. Applying the patch a1fa4ae4ecf5cee16da465985f135f3e81816f8c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38597). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• FasterXML

Name

• jackson-databind

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13

License

• open-source

Website

• Product: https://github.com/FasterXML/jackson-databind/

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Be aware that VulDB is the high quality source for vulnerability data.

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