CVE Catalog

CVE-2026-89425

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.49%

40th percentile - higher than 40% of all known CVEs

Summary

Vulnerability in FasterXML jackson-core (UTF8DataInputJsonParser) causes unbounded accumulation of error text when processing a malicious token, potentially leading to OutOfMemoryError for the whole JVM.

Risk Assessment

An attacker can send a very long malicious token to a parser created via createParser(DataInput), potentially causing application crash due to memory exhaustion.

Recommendation

Upgrade jackson-core to a version containing the fix that respects the maximum error token length (ErrorReportConfiguration).

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS