DoS via deep JSON parsing in jackson-databind 2.13.x (readTree & toString)
CVE-2026-50193 Published on June 23, 2026
jackson-databind: Deeply nested JsonNode throws StackOverflowError for toString()
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.
Vulnerability Analysis
CVE-2026-50193 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software 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.
CVE-2026-50193 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-50193
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Affected Versions
FasterXML jackson-databind Version >= 2.10.0, < 2.14.0 is affected by CVE-2026-50193Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.