CVE-2026-18401

A flaw was found in jackson-core. The non-blocking asynchronous JSON parser does not properly enforce the maximum number length constraint. A remote attacker can exploit this by submitting a specially crafted JSON document containing an arbitrarily long number to an application using the...

CVE-2026-68494

The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 GHSA-72hv-8253-57qq, number length constraint bypass in the non-blocking parser is incomplete. This record covers the remaining bypass. The earlier fix wired validateIntegerLength into a new setIntLength helper and invoked it...

CVE-2026-18401

The non-blocking asynchronous JSON parser in jackson-core does not enforce the maxNumberLength constraint defined in StreamReadConstraints default: 1000 characters. An attacker able to submit JSON to an application that uses the async parser API can supply a number token of arbitrary length,...

EUVD-2026-52703

The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 GHSA-72hv-8253-57qq, number length constraint bypass in the non-blocking parser is incomplete. This record covers the remaining bypass. The earlier fix wired validateIntegerLength into a new setIntLength helper and invoked it...

CVE-2026-68494

This CVE notes an incomplete fix for CVE-2026-18401 in jackson-core’s non-blocking parser, leaving a remaining bypass for number-length constraints when data is streamed in many small chunks. The issue arises in the async parser path (MINOR_NUMBER_INTEGER_DIGITS) where validateIntegerLength() is ...

CVE-2026-68494 jackson-core: Async parser maxNumberLength bypass via chunked digit accumulation (incomplete fix for CVE-2026-18401 / GHSA-72hv-8253-57qq)

The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 GHSA-72hv-8253-57qq, number length constraint bypass in the non-blocking parser is incomplete. This record covers the remaining bypass. The earlier fix wired validateIntegerLength into a new setIntLength helper and invoked it...

EUVD-2026-52699

The non-blocking asynchronous JSON parser in jackson-core does not enforce the maxNumberLength constraint defined in StreamReadConstraints default: 1000 characters. An attacker able to submit JSON to an application that uses the async parser API can supply a number token of arbitrary length,...

CVE-2026-18401 jackson-core: Number length constraint bypass in non-blocking (async) JSON parser leads to potential denial of service

The non-blocking asynchronous JSON parser in jackson-core does not enforce the maxNumberLength constraint defined in StreamReadConstraints default: 1000 characters. An attacker able to submit JSON to an application that uses the async parser API can supply a number token of arbitrary length,...

CVE-2026-18401 jackson-core: Number length constraint bypass in non-blocking (async) JSON parser leads to potential denial of service

The non-blocking asynchronous JSON parser in jackson-core does not enforce the maxNumberLength constraint defined in StreamReadConstraints default: 1000 characters. An attacker able to submit JSON to an application that uses the async parser API can supply a number token of arbitrary length,...

CVE-2026-18401

The CVE describes a vulnerability in jackson-core’s non-blocking (async) JSON parser where maxNumberLength is not enforced, unlike the synchronous parser. Root cause: the async parsing path in NonBlockingUtf8JsonParserBase does not invoke number length validation; _finishNumberIntegralPart() accu...

Security Bulletin: Jackson-core Async JSON Parser Bypasses maxNumberLength Constraint Leading to DoS

Summary The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength constraint default: 1000 characters defined in StreamReadConstraints. This allows an attacker to send JSON with arbitrarily long numbers through the async parser API, leading to excessive memory allocation and...

Security Bulletin: DevOps Test Performance contains a vulnerability related to use of the jackson-core library

Summary Due to use of the jackson-core library, DevOps Test Performance and Rational Performance Tester contain a potential Denial of Service DoS vulnerability. Vulnerability Details ID:WS-2026-0003 DESCRIPTION: The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in which the non-blocking async JSON parser can be made to bypass the maxNumberLength constraint default: 1000 characters defined in StreamReadConstraints. An attacker can cause...

jackson-core: Number Length Constraint Bypass in Async Parser Leads to Potential DoS Condition

Summary The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength constraint default: 1000 characters defined in StreamReadConstraints. This allows an attacker to send JSON with arbitrarily long numbers through the async parser API, leading to excessive memory allocation and...