What’s Vulnerable › Vulnerabilities

CVE-2026-29062: jackson-core: Nesting Depth Constraint Bypass in `UTF8DataInputJsonParser` potentially allowing Resource Exhaustion

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-06 · updated 2026-07-15
• Weakness: CWE-770

Description

jackson-core contains core low-level incremental ("streaming") parser and generator abstractions used by Jackson Data Processor. From version 3.0.0 to before version 3.1.0, 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). This issue has been patched in version 3.1.0.

Affected products

• FasterXML jackson-core: from 3.0.0 before 3.1.0 — fixed in 3.1.0

How to fix

Upgrade to a fixed version: FasterXML jackson-core 3.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/FasterXML/jackson-core/commit/8b25fd67f20583e75fb09564ce1eaab06cd5a902
• https://github.com/FasterXML/jackson-core/pull/1554
• https://github.com/FasterXML/jackson-core/security/advisories/GHSA-6v53-7c9g-w56r
• https://access.redhat.com/security/cve/CVE-2026-29062
• https://bugzilla.redhat.com/show_bug.cgi?id=2445135
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29062.json

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