# CVE-2026-50193: FasterXML jackson-databind denial of service via deeply nested JSON

Source: https://junglewise.ai/threats/cve-2026-50193-fasterxml-jackson-databind-denial-of-service-via-deeply-nested  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-23. Updated: 2026-06-23  
License: CC BY 4.0 with a link back

CVE-2026-50193 · Severity: medium · CVSS 3.1 · Published 2026-06-23

A vulnerability in a widely used Java data-processing library could allow an attacker to crash a service or cause a significant slowdown. By sending a specially crafted, deeply nested JSON file, an attacker can trigger a memory or processing error when the application attempts to convert that data into a text string. This results in a denial-of-service, potentially making the affected application unavailable to legitimate users.

Technologies: [FasterXML Jackson Databind](https://junglewise.ai/threats/technologies/jackson-databind), [com.fasterxml.jackson.core:jackson-databind (Maven)](https://junglewise.ai/threats/technologies/com-fasterxml-jackson-core-jackson-databind). Vendors: [FasterXML](https://junglewise.ai/threats/vendors/fasterxml), [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-50193 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50193 being exploited in the wild.

**How severe is CVE-2026-50193?** Medium severity, with a CVSS score of 3.1, published 23 June 2026.

**Which products and versions are affected?** FasterXML Jackson Databind >= 2.10.0, <= 2.13.5; com.fasterxml.jackson.core:jackson-databind (Maven) >= 2.10.0, <= 2.13.5, ECOSYSTEM:introduced=2.10.0,fixed=2.14.0.

**Is there a fix for CVE-2026-50193?** Yes. com.fasterxml.jackson.core:jackson-databind (Maven): upgrade to 2.14.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-50193 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-50193?** Check whether you run FasterXML Jackson Databind or com.fasterxml.jackson.core:jackson-databind (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- com.fasterxml.jackson.core:jackson-databind (Maven): upgrade to 2.14.0 or later

  ```sh
  # set com.fasterxml.jackson.core:jackson-databind to 2.14.0 in your pom.xml or build.gradle
  ```


## Technical details

A Denial-of-Service (DoS) vulnerability exists in jackson-databind due to uncontrolled resource consumption (CWE-400) during the serialization of deeply nested JSON structures. The issue occurs specifically when an application reads deeply nested JSON (thousands of levels) into a JsonNode using ObjectMapper.readTree() and then invokes JsonNode.toString(). This process can trigger a StackOverflowError or consume excessive CPU and memory resources. The vulnerability affects versions 2.10.0 through 2.13.x and is fixed in version 2.14.0. As a workaround, developers are advised to use ObjectMapper.writeValueAsString(node) instead of JsonNode.toString().

## Affected products

- FasterXML jackson-databind >= 2.10.0, < 2.14.0

## Identifiers

- CVE-2026-50193
- GHSA-3wrr-7qpf-2prh

## Timeline

- 2022-04-05: disclosed: Issue first reported on GitHub
- 2026-05-28: advisory: GitHub Security Advisory published
- 2026-06-23: patched: CVE published and fix confirmed in 2.14.0

## References

- [https://github.com/FasterXML/jackson-databind/commit/a1fa4ae4ecf5cee16da465985f135f3e81816f8c](https://github.com/FasterXML/jackson-databind/commit/a1fa4ae4ecf5cee16da465985f135f3e81816f8c)
- [https://github.com/FasterXML/jackson-databind/issues/3447](https://github.com/FasterXML/jackson-databind/issues/3447)
- [https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-3wrr-7qpf-2prh](https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-3wrr-7qpf-2prh)

## Related threats

- [jackson-databind type validation bypass in generic arguments](https://junglewise.ai/threats/cve-2026-110879-jackson-databind-validates-the-outer-class-of-a-class-name-type)
- [Jackson Protobuf Parser integer overflow in string key parsing](https://junglewise.ai/threats/cve-2026-110747-protobufparser-readstringkey-reads-the-length-prefix-of-a)
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- [FasterXML Jackson Databind unbounded cache growth on unknown type IDs](https://junglewise.ai/threats/cve-2026-91776-jackson-databind-retains-every-unknown-raw-type-id)
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