GitHub Advisoryadvisory · Maven
GHSA-3wrr-7qpf-2prh jackson-databind: Deeply nested JsonNode throws StackOverflowError for toString()
MEDIUM
Official page ↗
- Aliases
- CVE-2026-50193
- Ecosystem
- Maven
- Packages
- com.fasterxml.jackson.core:jackson-databind
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400
- Reviewed
- 2026-06-23
Affected packages
• Maven com.fasterxml.jackson.core:jackson-databind: >= 2.10.0, < 2.14.0 → fixed in 2.14.0
Description
Impact
Potential Denial-of-Service when attacker sends deeply nested JSON if (and only if) service:
1. Reads deeply nested (1000s of levels) JSON as `JsonNode` (ObjectMapper.readTree())
2. Writes out same (or modifided) node using `JsonNode.toString()`
which can consume significant amount of resources with concurrent relatively small requests (1000 nested arrays is 2kB).
Patches
Fixed in 2.14.0 via https://github.com/FasterXML/jackson-databind/issues/3447.
Workarounds
Avoid serializing `JsonNode` using `toString()`: use ObjectMapper.writeValueAsString(node)
Related
Alias · CVE (1)
- CVE-2026-50193 jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. vulnerability
Weakness · CWE (1)
- CWE-400 Uncontrolled Resource Consumption weakness
References
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-3wrr-7qpf-2prh web
- https://nvd.nist.gov/vuln/detail/CVE-2026-50193 advisory
- https://github.com/FasterXML/jackson-databind/issues/3447 web
- https://github.com/FasterXML/jackson-databind/commit/a1fa4ae4ecf5cee16da465985f135f3e81816f8c web
- https://github.com/FasterXML/jackson-databind package