CVE-2026-29062: jackson-core has Nesting Depth Constraint Bypass in `UTF8DataInputJsonParser` potentially allowing Resource Exhaustion
(updated )
The UTF8DataInputJsonParser, which is used when parsing from a java.io.DataInput source, bypasses the maxNestingDepth constraint (default: 500) defined in StreamReadConstraints.
A similar issue was found in ReaderBasedJsonParser.
This allows a user to supply a JSON document with excessive nesting, which can cause a StackOverflowError when the structure is processed, leading to a Denial of Service (DoS).
The related fix for com.fasterxml.jackson.core:jackson-core, CVE-2025-52999, was not fully applied to tools.jackson.core:jackson-core until the 3.1.0 release. It is recommended that 3.0.x users upgrade.
References
- github.com/FasterXML/jackson-core
- github.com/FasterXML/jackson-core/commit/8b25fd67f20583e75fb09564ce1eaab06cd5a902
- github.com/FasterXML/jackson-core/pull/1554
- github.com/FasterXML/jackson-core/security/advisories/GHSA-6v53-7c9g-w56r
- github.com/FasterXML/jackson-core/security/advisories/GHSA-h46c-h94j-95f3
- github.com/advisories/GHSA-6v53-7c9g-w56r
- nvd.nist.gov/vuln/detail/CVE-2025-52999
- nvd.nist.gov/vuln/detail/CVE-2026-29062
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