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Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity resource allocation without limits in jackson-core from FasterXML. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Maventools.jackson.core:jackson-core3.1.0GHSA-6v53-7c9g-w56r
Ubuntu:22.04:LTSjackson-coreno fix listedUBUNTU-CVE-2026-29062
Ubuntu:24.04:LTSjackson-coreno fix listedUBUNTU-CVE-2026-29062
Ubuntu:25.10jackson-coreno fix listedUBUNTU-CVE-2026-29062
Ubuntu:26.04:LTSjackson-coreno fix listedUBUNTU-CVE-2026-29062
Ubuntu:26.10jackson-coreno fix listedUBUNTU-CVE-2026-29062

Affected products (as reported)

VendorProductVersions
FasterXML jackson-core >= 3.0.0, < 3.1.0

Weakness: CWE-770, CWE-1284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References