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Fencer Intel
high 7.5

CVE-2026-89425 json

jackson-core: UTF8DataInputJsonParser._reportInvalidToken() does not honor maxErrorTokenLength, allowing unbounded StringBuilder growth

published last mo. modified last mo. also EUVD-2026-85000 , GHSA-7hhh-6rmp-j9qf

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

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 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.

Patch / fix

  • maven com.fasterxml.jackson.core:jackson-core 2.18.11, 2.21.7, 2.22.3
  • maven tools.jackson.core:jackson-core 3.1.7, 3.2.3
  • com.fasterxml.jackson.core jackson-core 2.18.11, 2.21.7, 2.22.3
  • tools.jackson.core jackson-core 3.1.7, 3.2.3
  • jackson-core Debian 14 2.18.11-1

debian advisories DEBIAN-CVE-2026-89425

  • jackson-databind SLES for SAP applications 16.0, SLES 16.0 2.18.11-160000.1.1
  • jackson-core SLES for SAP applications 16.0, SLES 16.0 2.18.11-160000.1.1
  • jackson-annotations SLES for SAP applications 16.0, SLES 16.0 2.18.11-160000.1.1
  • jackson-core SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.18.11-150200.3.30.1
  • jackson-databind SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.18.11-150200.3.36.1
  • jackson-annotations SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.18.11-150200.3.28.1
  • jackson-dataformat-xml SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.18.11-150200.5.8.1
  • jackson-dataformats-binary SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.18.11-150200.3.29.1

suse advisories SUSE-SU-2026:24149-1SUSE-SU-2026:4394-1

  • jackson-databind openSUSE Leap 16.0 2.18.11-160000.1.1
  • jackson-core openSUSE Leap 16.0 2.18.11-160000.1.1
  • jackson-annotations openSUSE Leap 16.0 2.18.11-160000.1.1
  • jackson-core openSUSE Tumbleweed 2.18.11-1.1

opensuse advisories openSUSE-SU-2026:22034-1openSUSE-SU-2026:11876-1

  • xsom AlmaLinux 8 0-19.20110809svn.module_el8.5.0+2577+9e95fe00
  • slf4j AlmaLinux 8 1.7.25-4.module_el8.5.0+2577+9e95fe00
  • stax-ex AlmaLinux 8 1.7.7-8.module_el8.5.0+2577+9e95fe00
  • velocity AlmaLinux 8 1.7-24.module_el8.5.0+2577+9e95fe00
  • xalan-j2 AlmaLinux 8 2.7.1-38.module_el8.5.0+2577+9e95fe00
  • javassist AlmaLinux 8 3.18.1-8.module_el8.5.0+2577+9e95fe00
  • xerces-j2 AlmaLinux 8 2.11.0-34.module_el8.5.0+2577+9e95fe00
  • slf4j-jdk14 AlmaLinux 8 1.7.25-4.module_el8.5.0+2577+9e95fe00

almalinux advisories ALSA-2026:90909ALSA-2026:86706

  • xsom Rocky Linux 8 0-19.20110809svn.module+el8.10.0+1763+c7c02164
  • xsom Rocky Linux 8 0-19.20110809svn.module+el8.10.0+2052+1b0fb438
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.10.0+1763+c7c02164
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.10.0+2052+1b0fb438
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.6.0+843+5a13dac3
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.3.0+74+855e3f5d
  • slf4j Rocky Linux 8 1.7.25-4.module+el8.10.0+2003+8aeac9cb
  • stax-ex Rocky Linux 8 1.7.7-8.module+el8.10.0+1763+c7c02164

rocky linux advisories RLSA-2026:90909RLSA-2026:86706

Is CVE-2026-89425 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-89425 updated cvss 7.5

com.fasterxml.jackson.core/jackson-core: Jackson-core: Denial of Service via unbounded StringBuilder growth during malformed token processing

  • Red Hat Exploit Intelligence exploit-intelligence/agent-client-rhel9 Red Hat OpenShift Developer Tools and Services jenkins, jenkins-2-plugins Red Hat OpenShift Serverless openshift-serverless-1/kn-ekb-receiver-rhel9, openshift-serverless-1/kn-ekb-dispatcher-rhel9, openshift-serverless-1/kn-eventing-integrations-log-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-s3-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sns-sink-rhel9, openshift-serverless-1/kn-eventing-integrations-aws-sqs-sink-rhel9, +4 more
    affected: workaround, no fix available
  • Red Hat AI Inference Server rhaii/vllm-gaudi-rhel9, rhaiis/vllm-cuda-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat AMQ Broker 7 jackson-core Red Hat build of Apache Camel - HawtIO 4 jackson-core Red Hat build of Apache Camel 4 for Quarkus 3 jackson-core Red Hat build of Apache Camel for Spring Boot 4 jackson-core Red Hat build of Apicurio Registry 3 jackson-core Red Hat build of Debezium 3 jackson-core
    +1 more products
    Red Hat Build of Keycloak jackson-core, rhbk/keycloak-rhel9, keycloak/rhbk-rhel9-operator, rhbk/keycloak-rhel9-operator, keycloak/rhbk-openshift-rhel9
    affected: workaround, no fix available
  • Red Hat Ceph Storage 8 liborc1 Red Hat Ceph Storage 9 liborc, liborc2, libarrow, parquet-libs
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Certificate System 10 redhat-pki Red Hat Certificate System 11 redhat-pki Red Hat Data Grid 8 jackson-core
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-gaudi-rhel9 Red Hat JBoss Enterprise Application Platform 7 jackson-core, jboss-eap-7/eap74-els-openjdk8-openshift-rhel8, jboss-eap-7/eap74-els-openjdk11-openshift-rhel8, jboss-eap-7/eap74-els-openjdk17-openshift-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat JBoss Web Server 7 jboss-webserver-7/jws70-openjdk17-openshift-rhel9, jboss-webserver-7/jws70-openjdk17-rhel9-openshift, jboss-webserver-7/jws70-openjdk21-openshift-rhel9, jboss-webserver-7/jws70-openjdk21-rhel9-openshift Red Hat Lightspeed for Runtimes Operator rh-lightspeed-runtimes/runtimes-agent-init-rhel9
    affected: workaround, no fix available
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-modelmesh-rhel9, rhoai/odh-vllm-gaudi-rhel9, rhoai/odh-spark-operator-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhai-early-access/docling-serve-cuda-rhel9, rhoai/odh-th06-cuda130-torch291-py312-rhel9, +12 more
    affected: workaround, no fix available, no fix planned “Will not fix”
show 19 more
  • Red Hat OpenShift Dev Spaces devspaces/server-rhel9, devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9, devspaces/multicluster-redirector-rhel9
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 13 (Queens) opendaylight
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Satellite 6 puppetserver
    affected: workaround, no fix available
  • Red Hat Single Sign-On 7 jackson-core
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4/jenkins-rhel8 1792044326
    fixed: vendor fix RHSA-2026:88152
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4/jenkins-rhel8 1792044327
    fixed: vendor fix RHSA-2026:88149
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4/jenkins-rhel8 1792044382
    fixed: vendor fix RHSA-2026:88151
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4/jenkins-rhel8 1792044386
    fixed: vendor fix RHSA-2026:88150
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4/jenkins-rhel9 1792040287
    fixed: vendor fix RHSA-2026:88156
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4/jenkins-rhel9 1792040131
    fixed: vendor fix RHSA-2026:88159
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4/jenkins-rhel9 1792041514
    fixed: vendor fix RHSA-2026:88153
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4/jenkins-rhel9 1792040733
    fixed: vendor fix RHSA-2026:88158
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4/jenkins-rhel9 1792040081
    fixed: vendor fix RHSA-2026:88157
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4/jenkins-rhel9 1792040096
    fixed: vendor fix RHSA-2026:88155
  • Red Hat OpenShift Developer Tools and Services 4.22 ocp-tools-4/jenkins-rhel9 1792040428
    fixed: vendor fix RHSA-2026:88154
  • Red Hat Build of Apache Camel 3.33.4.redhat jackson-core 2.21.7.redhat-00001
    fixed: vendor fix RHSA-2026:83670
  • Red Hat build of Quarkus 3.27.6.redhat jackson-core 2.21.7.redhat-00001
    fixed: vendor fix RHSA-2026:83082
  • Red Hat build of Quarkus 3.33.4.redhat jackson-core 2.21.7.redhat-00001
    fixed: vendor fix RHSA-2026:83520
  • Red Hat Enterprise Linux AppStream (v. 8) slf4j 1.7.25-4.module+el8.10.0+20993+d0f024b0, stax-ex 1.7.7-8.module+el8.10.0+20993+d0f024b0, velocity 1.7-24.module+el8.10.0+20993+d0f024b0, bea-stax 1.2.0-16.module+el8.10.0+20993+d0f024b0, xalan-j2 2.7.1-38.module+el8.10.0+20993+d0f024b0, javassist 3.18.1-8.module+el8.10.0+20993+d0f024b0, +27 more
    fixed: vendor fix RHSA-2026:90909

14 more fixed, 32 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/FasterXML/jackson-core/security/advisories/GHSA-7hhh-6rmp-j9qf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
maven com.fasterxml.jackson.core:jackson-core
>=2.19.0, <2.21.7
>=2.22.0, <2.22.3
>=2.8.0, <2.18.11
2.21.7
2.22.3
2.18.11
maven tools.jackson.core:jackson-core
>=3.0.0, <3.1.7
>=3.2.0, <3.2.3
3.1.7
3.2.3

Affected products

  • FasterXML jackson-core

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.