{"id":"CVE-2026-29062","aliases":["GHSA-6v53-7c9g-w56r"],"url":"https://o3.security/vulnerability/CVE-2026-29062","summary":"jackson-core: Nesting Depth Constraint Bypass in `UTF8DataInputJsonParser` potentially allowing Resource Exhaustion","details":"### Summary\nThe `UTF8DataInputJsonParser`, which is used when parsing from a `java.io.DataInput` source, bypasses the `maxNestingDepth` constraint (default: 500) defined in `StreamReadConstraints`.\n\nA similar issue was found in `ReaderBasedJsonParser`.\n\nThis 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).\n\nThe 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.\n\n### Patches\njackson-core contains a configurable limit for how deep Jackson will traverse in an input document. This check was missing in a few places in tools.jackson.core:jackson-core. \n\nThe change is in https://github.com/FasterXML/jackson-core/pull/1554. jackson-core will throw a StreamConstraintsException if the limit is reached.\n\njackson-databind also benefits from this change because it uses jackson-core to parse JSON inputs.\n\n### Workarounds\nUsers should avoid parsing input files from untrusted sources.\n\n### Resources\n[GHSA-6v53-7c9g-w56r](https://github.com/FasterXML/jackson-core/security/advisories/GHSA-6v53-7c9g-w56r)\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-52999\nhttps://github.com/FasterXML/jackson-core/pull/1554","published":"2026-03-06T07:14:25.059Z","modified":"2026-08-12T15:32:15.068962Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"tools.jackson.core:jackson-core","fixedVersion":"3.1.0"}],"fix":{"url":"https://github.com/FasterXML/jackson-core/commit/8b25fd67f20583e75fb09564ce1eaab06cd5a902","label":"FasterXML/jackson-core@8b25fd6"},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29062.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-29062"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29062.json"},{"type":"ADVISORY","url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-6v53-7c9g-w56r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29062"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2445135"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-core/commit/8b25fd67f20583e75fb09564ce1eaab06cd5a902"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-core/pull/1554"},{"type":"WEB","url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-h46c-h94j-95f3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52999"},{"type":"PACKAGE","url":"https://github.com/FasterXML/jackson-core"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T15:32:15.068962Z"}}