CVE-2026-29062
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.55% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770, CWE-1284
- Affected
- fasterxml/jackson-core
- Source
- security-advisories@github.com
References
- https://github.com/FasterXML/jackson-core/commit/8b25fd67f20583e75fb09564ce1eaab06cd5a902Patch
- https://github.com/FasterXML/jackson-core/pull/1554Issue Tracking, Patch
- https://github.com/FasterXML/jackson-core/security/advisories/GHSA-6v53-7c9g-w56rPatch, Vendor Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.