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,...

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-2026-18401 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,...

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

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...

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

Summary The fix released in jackson-core 2.18.6 and 2.21.1 for GHSA-72hv-8253-57qq Number Length Constraint Bypass in Async Parser, published 2026-02-28 is incomplete. The fix commit b0c428e6 1555 wired validateIntegerLength into a new setIntLength helper and called it at every place where the...

GHSA-R7WM-3CXJ-WFF9 jackson-core: Async parser maxNumberLength bypass via chunked digit accumulation (incomplete fix for GHSA-72hv-8253-57qq)

Summary The fix released in jackson-core 2.18.6 and 2.21.1 for GHSA-72hv-8253-57qq Number Length Constraint Bypass in Async Parser, published 2026-02-28 is incomplete. The fix commit b0c428e6 1555 wired validateIntegerLength into a new setIntLength helper and called it at every place where the...

Security Bulletin: Vulnarability in jackson-core library (WS-2026-0003) affects Power HMC.

Summary The jackson-core library is used by Power Hardware Management Console HMC. HMC has addressed the applicable CVE. Vulnerability Details ID:WS-2026-0003 DESCRIPTION: The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength constraint default: 1000 characters defined i...

Security Bulletin: IBM SPSS Analytic Server is affected by a jackson-core async parser DoS vulnerability (WS-2026-0003)

Summary IBM SPSS Analytic Server is affected by a jackson-core async parser DoS vulnerability WS-2026-0003. This has been addressed in the remediation section. Vulnerability Details ID:WS-2026-0003 DESCRIPTION: The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength...

Security Bulletin: There is a vulnerability in jackson-core-2.15.1.jar used by IBM Maximo Manage application in IBM Maximo Application Suite (WS-2026-0003)

Summary There is a vulnerability in jackson-core-2.15.1.jar used by IBM Maximo Manage application in IBM Maximo Application Suite. Vulnerability Details ID:WS-2026-0003 DESCRIPTION: The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength constraint default: 1000 characters...

Security Bulletin: Due to use of jackson-core-2.19.4.jar, IBM Sterling Connect:Direct Web Services is affected by Denial of Service (DoS) issue.

Summary jackson-core-2.19.4.jar is used by IBM Sterling Connect:Direct Web Services WS-2026-0003. Vulnerability Details ID:WS-2026-0003 DESCRIPTION: The non-blocking async JSON parser in jackson-core bypasses the maxNumberLength constraint default: 1000 characters defined in StreamReadConstraints...

jackson-core -- StreamReadConstraints can be bypassed

The Jackson project reports: Enforce maxNameLength incrementally in ReaderBasedJsonParser Fail parsing from DataInput if StreamReadConstraints.getMaxDocumentLength set Fix maxDocumentLength bypass in async parser single feedInput case Enforce StreamReadConstraints.maxNumberLength for non-blocking...

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...

GHSA-72HV-8253-57QQ 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...

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...

PT-2026-67715

Name of the Vulnerable Software and Affected Versions jackson-core versions 2.15.0 through 2.18.5 jackson-core versions 2.19.0 through 2.21.0 jackson-core versions 3.0.0 through 3.0.x Description The non-blocking asynchronous JSON parser in jackson-core fails to enforce the maxNumberLength...