# CVE-2026-68494: eap8-activemq-artemis: The fix released in jackson-core 2.18.6 and 2.21.1 for CVE-2026-18401 (GHSA-72hv-8253-57qq, number length constraint... CVE-2026-68494 is fixed in 46 products on 1 platform, first by ALAS2023-2026-2067, released August 17, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-68494 - Priority: High - CVSS: 7.5 (important) - EPSS: 0.0046 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 4, 2026 ## Description 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 wherever the integer portion of a number is decided: a terminator byte arrives, a '.' or 'e'/'E' is seen, or input ends inside a fully buffered value. It was not invoked on the attacker-relevant path where the parser runs out of input while still inside the MINOR_NUMBER_INTEGER_DIGITS minor state and returns NOT_AVAILABLE to the caller. As a result, an attacker who streams JSON to a non-blocking parser in many small chunks, without ever sending a terminator byte, keeps the parser inside MINOR_NUMBER_INTEGER_DIGITS indefinitely. _textBuffer.expandCurrentSegment() grows the accumulator on every chunk while validateIntegerLength() is never called. The accumulator is bounded only by maxStringLength (20 MiB by default) rather than by maxNumberLength (1000 by default), an amplification of roughly 20,000x over the documented limit. Because Java char values occupy two bytes, a single connection can be driven to approximately 40 MiB of heap before the validator finally fires when the value completes. The equivalent fraction-path code is correct: _finishFloatFraction() calls _setFractLength() before its NOT_AVAILABLE return. The missing call affects the integer-digit paths in _startPositiveNumber(), _startNegativeNumber() and _finishNumberIntegralPart() in NonBlockingUtf8JsonParserBase. Impact: reactive frameworks such as Spring WebFlux/Reactor, Quarkus, Helidon and Vert.x feed inbound HTTP or gRPC bytes to the async parser as they arrive, which is precisely the chunked-feed shape required. Operators who set StreamReadConstraints.maxNumberLength expecting it to cap memory per number value do not get that guarantee; memory accumulates per concurrent connection and attacker-controlled concurrency can exhaust the JVM heap. The synchronous parsers (UTF8StreamJsonParser, ReaderBasedJsonParser) and the async parser operating on complete input are not affected. Exploitation requires only the ability to stream data to a parsing endpoint; no privileges or user interaction are needed. This issue affects com.fasterxml.jackson.core:jackson-core from version 2.15.0 through 2.18.7, and from 2.19.0 through 2.21.3, and tools.jackson.core:jackson-core from 3.0.0 through 3.1.3. Versions prior to 2.15.0 are not affected, because StreamReadConstraints -- which defines the maxNumberLength setting -- was first introduced in jackson-core 2.15.0, so no such constraint exists to be bypassed in earlier releases. Note that GHSA-r7wm-3cxj-wff9 states the affected 2.x range without a lower bound. The 2.22.x and 3.2.x release lines are not affected: those branches were created after the fix commit landed on 2026-05-21 and therefore contain it from their initial releases (2.22.0, tagged 2026-06-03, and 3.2.0, tagged 2026-06-08). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | eap8-activemq-artemis RHEL 10 | 2.40.0-8.redhat_00024.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-apache-cxf RHEL 10 | 4.1.7-1.SP1_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-artemis-wildfly-integration RHEL 10 | 2.0.5-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-bouncycastle RHEL 10 | 1.85.0-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-cryptacular RHEL 10 | 1.2.7-1.redhat_00002.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-eap-product-conf-parent RHEL 10 | 801.8.0-1.GA_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-hibernate RHEL 10 | 6.6.54-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-httpcomponents-asyncclient RHEL 10 | 4.1.5-5.redhat_00008.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-ironjacamar RHEL 10 | 3.0.22-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-annotations RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-core RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-databind RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-dataformats-text RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-jaxrs-providers RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-modules-base RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jackson-modules-java8 RHEL 10 | 2.18.9-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jakarta-xml-bind-api RHEL 10 | 4.0.5-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jaxb RHEL 10 | 4.0.7-4.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jaxbintros RHEL 10 | 2.1.0-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jboss-logging RHEL 10 | 3.6.3-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jboss-remoting RHEL 10 | 5.0.31-1.SP2_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jbossws-api RHEL 10 | 3.1.0-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jbossws-common-tools RHEL 10 | 2.2.0-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jbossws-cxf RHEL 10 | 7.4.0-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jbossws-jaxws-undertow-httpspi RHEL 10 | 3.0.1-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jbossws-spi RHEL 10 | 5.1.0-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-jsf-impl RHEL 10 | 4.0.11-2.SP1_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-log4j RHEL 10 | 2.25.4-1.redhat_00003.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-neethi RHEL 10 | 3.2.2-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-netty RHEL 10 | 4.1.136-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-netty-transport-native-epoll RHEL 10 | 4.1.136-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-nimbus-jose-jwt RHEL 10 | 9.37.4-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-parsson RHEL 10 | 1.1.9-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-saaj-impl RHEL 10 | 3.0.6-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-slf4j RHEL 10 | 2.0.18-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-undertow RHEL 10 | 2.3.26-2.SP3_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-wildfly RHEL 10 | 8.1.8-9.GA_redhat_00006.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-wildfly-elytron RHEL 10 | 2.6.11-1.Final_redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-wildfly-javadocs RHEL 10 | 8.1.1-12.GA_redhat_00048.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-ws-commons-XmlSchema RHEL 10 | 2.3.2-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | eap8-xml-security RHEL 10 | 3.0.6-1.redhat_00001.1.el10eap | [RHSA-2026:70230](https://patchblox.com/security/data/fix/linux/rhsa-2026-70230.md) | Sep 23, 2026 | | Linux | jackson-annotations opensuse-leap 16.0 | 2.18.11-160000.1.1 | [OPENSUSE-SU-2026:22034-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22034-1.md) | Oct 6, 2026 | | Linux | jackson-annotations sles 15.6 | 2.18.11-150200.3.28.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-annotations sles 15.7 | 2.18.11-150200.3.28.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-annotations sles 16.0 | 2.18.11-160000.1.1 | [SUSE-SU-2026:24149-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24149-1.md) | Oct 6, 2026 | | Linux | jackson-core amzn 2023 | 2.21.5-2.amzn2023.0.1 | [ALAS2023-2026-2067](https://patchblox.com/security/data/fix/linux/alas2023-2026-2067.md) | Aug 17, 2026 | | Linux | jackson-core opensuse-leap 16.0 | 2.18.11-160000.1.1 | [OPENSUSE-SU-2026:22034-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22034-1.md) | Oct 6, 2026 | | Linux | jackson-core sles 15.6 | 2.18.11-150200.3.30.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-core sles 15.7 | 2.18.11-150200.3.30.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-core sles 16.0 | 2.18.11-160000.1.1 | [SUSE-SU-2026:24149-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24149-1.md) | Oct 6, 2026 | | Linux | jackson-databind opensuse-leap 16.0 | 2.18.11-160000.1.1 | [OPENSUSE-SU-2026:22034-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22034-1.md) | Oct 6, 2026 | | Linux | jackson-databind sles 15.6 | 2.18.11-150200.3.36.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-databind sles 15.7 | 2.18.11-150200.3.36.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-databind sles 16.0 | 2.18.11-160000.1.1 | [SUSE-SU-2026:24149-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24149-1.md) | Oct 6, 2026 | | Linux | jackson-dataformat-xml sles 15.6 | 2.18.11-150200.5.8.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-dataformat-xml sles 15.7 | 2.18.11-150200.5.8.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-dataformats-binary sles 15.6 | 2.18.11-150200.3.29.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | | Linux | jackson-dataformats-binary sles 15.7 | 2.18.11-150200.3.29.1 | [SUSE-SU-2026:4394-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4394-1.md) | Sep 29, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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