CVE-2025-52999: jackson-core Has Potential for StackoverflowError if user parses an input file that contains very deeply nested data

Severity: high (CVSS 8.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-25 · updated 2026-06-17
Weakness: CWE-121

Description

jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. In versions prior to 2.15.0, if a user parses an input file and it has deeply nested data, Jackson could end up throwing a StackoverflowError if the depth is particularly large. jackson-core 2.15.0 contains a configurable limit for how deep Jackson will traverse in an input document, defaulting to an allowable depth of 1000. jackson-core will throw a StreamConstraintsException if the limit is reached. jackson-databind also benefits from this change because it uses jackson-core to parse JSON inputs. As a workaround, users should avoid parsing input files from untrusted sources.

Affected products

Maven Com.Fasterxml.Jackson.Core:Jackson-Core: before 2.15.0; 2.0.0, 2.0.0-RC1, 2.0.0-RC2, 2.0.0-RC3, 2.0.1, 2.0.2 (+137) — fixed in 2.15.0
FasterXML jackson-core: before 2.15.0

How to fix

Upgrade to a fixed version: Maven Com.Fasterxml.Jackson.Core:Jackson-Core 2.15.0. Check the vendor advisory for mitigations.

References

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