{"id":"CVE-2026-89425","title":"UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound","summary":"UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-770","CWE-1050"],"vendor":"FasterXML","product":"com.fasterxml.jackson.core:jackson-core","affected":["com.fasterxml.jackson.core:jackson-core >= 2.8.0 <= 2.18.10","com.fasterxml.jackson.core:jackson-core >= 2.19.0 <= 2.21.6","com.fasterxml.jackson.core:jackson-core >= 2.22.0 <= 2.22.2","tools.jackson.core:jackson-core >= 3.0.0 <= 3.1.6","tools.jackson.core:jackson-core >= 3.2.0 <= 3.2.2"],"published":"2026-09-23","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:43:32.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89425","references":[{"url":"https://github.com/FasterXML/jackson-core/pull/1698","label":"36c7be3b-2937-45df-85ea-ca7133ea542c"},{"url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-7hhh-6rmp-j9qf","label":"36c7be3b-2937-45df-85ea-ca7133ea542c"},{"url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-7hhh-6rmp-j9qf","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89425.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89425"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539084"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89425"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89425"},{"url":"https://github.com/FasterXML/jackson-core/commit/211cf2c5d91abbec38067f37efc1363cd4e88ee3"},{"url":"https://github.com/FasterXML/jackson-core/releases/tag/jackson-core-2.18.11"},{"url":"https://github.com/FasterXML/jackson-core/releases/tag/jackson-core-3.2.3"},{"url":"https://github.com/advisories/GHSA-7hhh-6rmp-j9qf"},{"url":"https://access.redhat.com/errata/RHSA-2026:83082"},{"url":"https://access.redhat.com/errata/RHSA-2026:83520"},{"url":"https://access.redhat.com/errata/RHSA-2026:84734"},{"url":"https://access.redhat.com/errata/RHSA-2026:86706"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat","ghsa","maven"],"epss":0.00532,"epssPercentile":0.44773,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-23T13:54:51.050132Z"},"ingestedAt":"2026-09-23T03:16:01.007Z","aliases":["GHSA-7hhh-6rmp-j9qf"],"ecosystem":"maven","patched":["com.fasterxml.jackson.core:jackson-core 2.21.7","com.fasterxml.jackson.core:jackson-core 2.22.3","tools.jackson.core:jackson-core 3.1.7","tools.jackson.core:jackson-core 3.2.3","com.fasterxml.jackson.core:jackson-core 2.18.11"],"slug":"CVE-2026-89425","body":"## Overview\n\nUTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implementations, including UTF8StreamJsonParser, it never consults ErrorReportConfiguration.getMaxErrorTokenLength() (default 256). A malformed token supplied to a parser created through JsonFactory.createParser(DataInput) is therefore accumulated in full. No StreamReadConstraints setting mitigates this: maxDocumentLength cannot be applied to DataInput sources at all, and maxStringLength does not cover this path because the accumulation bypasses ReadConstrainedTextBuffer. The reporter measured a 20,000,109-character exception message from a 20-million-character malformed token on the DataInput path, against 367 characters for identical input on the InputStream path. Scaling the payload drives the StringBuilder, which also incurs byte-to-char expansion and internal array doubling, to many times the raw payload size and can trigger OutOfMemoryError for the whole JVM. UTF8DataInputJsonParser was introduced in 2.8.0 together with createParser(DataInput); releases before 2.8.0 do not contain the affected class.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Exploit Intelligence, OpenShift Developer Tools and Services, OpenShift Serverless, Red Hat AI Inference Server, Red Hat AMQ Broker 7, Red Hat build of Apache Camel - HawtIO 4, … · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat JBoss Enterprise Application Platform 7, Red Hat OpenShift AI (RHOAI), … · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89425.json)\n- **RHSA-2026:83082** · Red Hat · fixed in: Red Hat build of Quarkus 3.27.6.redhat · released 2026-10-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:83082)\n- **RHSA-2026:83520** · Red Hat · fixed in: Red Hat build of Quarkus 3.33.4.redhat · released 2026-10-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:83520)\n- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)\n- **RHSA-2026:86706** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86706)\n\n## Package advisory (CVE-2026-89425)\n\nAffected packages:\n\n- `com.fasterxml.jackson.core:jackson-core >= 2.19.0, <= 2.21.6`\n- `com.fasterxml.jackson.core:jackson-core >= 2.22.0, <= 2.22.2`\n- `tools.jackson.core:jackson-core >= 3.0.0, <= 3.1.6`\n- `tools.jackson.core:jackson-core >= 3.2.0, <= 3.2.2`\n- `com.fasterxml.jackson.core:jackson-core >= 2.8.0, <= 2.18.10`\n\nPatched in:\n\n- `com.fasterxml.jackson.core:jackson-core 2.21.7`\n- `com.fasterxml.jackson.core:jackson-core 2.22.3`\n- `tools.jackson.core:jackson-core 3.1.7`\n- `tools.jackson.core:jackson-core 3.2.3`\n- `com.fasterxml.jackson.core:jackson-core 2.18.11`\n\nSource: https://github.com/advisories/GHSA-7hhh-6rmp-j9qf","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":209690,"id":"CVE-2026-89425","ts":1790173575146,"field":"exploit_available","old":"false","new":"true"}]}