{"id":"UBUNTU-CVE-2026-89425","details":"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 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.","modified":"2026-09-24T02:00:54.344558042Z","published":"2026-09-23T03:17:00Z","upstream":["CVE-2026-89425"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-89425"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-89425"},{"type":"REPORT","url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-7hhh-6rmp-j9qf"},{"type":"REPORT","url":"https://github.com/FasterXML/jackson-core/pull/1698"}],"affected":[{"package":{"name":"jackson-core","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.2-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjackson2-core-java","binary_version":"2.4.2-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}},{"package":{"name":"jackson-core","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.6-1","2.9.1-1","2.9.4-1","2.9.8-3~18.04"],"ecosystem_specific":{"binaries":[{"binary_name":"libjackson2-core-java","binary_version":"2.9.8-3~18.04"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}},{"package":{"name":"jackson-core","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.8-3","2.10.0-1","2.10.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjackson2-core-java","binary_version":"2.10.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}},{"package":{"name":"jackson-core","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.1-1","2.13.0-1","2.13.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjackson2-core-java","binary_version":"2.13.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}},{"package":{"name":"jackson-core","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.14.1-1","binary_name":"libjackson2-core-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}},{"package":{"name":"jackson-core","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/jackson-core?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.1-1","2.14.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.14.1-1build1","binary_name":"libjackson2-core-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89425.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}