Upstream information
Description
StreamReadConstraints.maxNameLength (default 50,000 characters) is intended to bound how much memory a single JSON Object property name can consume while being parsed, independently of the much larger maxStringLength (default 100,000,000 characters) that bounds ordinary string values. For parsers built over character input - Reader, String or char[] sources, all served by ReaderBasedJsonParser - that bound is not applied while the name is being accumulated. The code path instead re-uses the string-value length check, which is roughly 2000x larger by default.In the character-input slow path, ReaderBasedJsonParser._parseName2() accumulates the name into the TextBuffer and, when a segment fills, calls TextBuffer.finishCurrentSegment(), which validates only maxStringLength. The correct check, StreamReadConstraints.validateNameLength(int), is reached afterwards in CharsToNameCanonicalizer.findSymbol(), once the entire name has been scanned to its closing quote. By that point the full name - up to maxStringLength characters - has already been buffered in memory.
A remote attacker who can have a single sufficiently long JSON Object property name parsed through this path can force allocation on the order of 100,000,000 characters (approximately 200 MB, with segment bookkeeping pushing real peak usage higher) before any StreamConstraintsException is thrown, instead of the approximately 50,000-character (about 100 KB) bound the API promises. Repeating this across concurrent requests can exhaust the heap and crash the process. No authentication or user interaction is required. Because StreamReadConstraints.maxDocumentLength is disabled by default (-1), nothing else bounds the token first, so the issue is exploitable under default configuration.
Byte-input parsers are not affected: UTF8StreamJsonParser, UTF8DataInputJsonParser and the non-blocking (async) parsers re-validate maxNameLength on every growth of the name-decode buffer via ParserBase._growNameDecodeBuffer(), rejecting an oversized name after allocating only tens of kilobytes. Applications are exposed when untrusted JSON is parsed from a String, Reader or char[] - for example an HTTP request body already read into a String - rather than from raw UTF-8 bytes.
This issue affects com.fasterxml.jackson.core:jackson-core from 2.16.0 and tools.jackson.core:jackson-core from 3.0.0. Releases before 2.16.0 are not affected, because StreamReadConstraints.maxNameLength was first introduced in jackson-core 2.16.0.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (HeroDevs) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
SUSE Security Advisories:
- SUSE-SU-2026:24149-1, published Thu Oct 15 19:06:37 CEST 2026
- SUSE-SU-2026:4394-1, published Tue Sep 29 23:01:41 CEST 2026
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| Container suse/multi-linux-manager/5.2/x86_64/server-attestation:5.2.1.11.5.1 Container suse/multi-linux-manager/5.2/x86_64/server:5.2.1.11.5.1 |
| |
| SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-4394 SUSE-SLE-Module-Development-Tools-15-SP7-2026-4394 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-4394 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-4394 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-4394 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-4394 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-4394 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 |
| Patchnames: SUSE-SLE-Module-Development-Tools-15-SP7-2026-4394 |
| SUSE Linux Enterprise Server 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-4394 |
| SUSE Linux Enterprise Server 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-4394 |
| SUSE Linux Enterprise Server 15 SP6-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-4394 |
| SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 |
| Patchnames: SUSE-SLES-16.0-1850 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP4-2026-4394 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP5-2026-4394 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP6-2026-4394 |
| openSUSE Leap 16.0 |
| Patchnames: openSUSE-Leap-16.0-1850 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-11876 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-annotations | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-core | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-databind | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-annotations | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-core | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-databind | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server 15 SP7 | jackson-annotations | Released |
| SUSE Linux Enterprise Server 15 SP7 | jackson-core | Released |
| SUSE Linux Enterprise Server 15 SP7 | jackson-databind | Released |
| SUSE Linux Enterprise Server 15 SP7 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server 15 SP7 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server 16.0 | jackson-annotations | Released |
| SUSE Linux Enterprise Server 16.0 | jackson-core | Released |
| SUSE Linux Enterprise Server 16.0 | jackson-databind | Released |
| SUSE Linux Enterprise Server 16.1 | jackson-annotations | In progress |
| SUSE Linux Enterprise Server 16.1 | jackson-core | In progress |
| SUSE Linux Enterprise Server 16.1 | jackson-databind | In progress |
| SUSE Linux Enterprise Server 16.2 | jackson-core | Affected |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | jackson-annotations | In progress |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | jackson-core | In progress |
| SUSE Linux Enterprise Server for NVIDIA 16.1 | jackson-databind | In progress |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-annotations | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-core | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-databind | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server for SAP applications 16.0 | jackson-annotations | Released |
| SUSE Linux Enterprise Server for SAP applications 16.0 | jackson-core | Released |
| SUSE Linux Enterprise Server for SAP applications 16.0 | jackson-databind | Released |
| SUSE Linux Enterprise Server for SAP applications 16.1 | jackson-annotations | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | jackson-core | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | jackson-databind | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.2 | jackson-core | Affected |
| openSUSE Leap 16.0 | jackson-core | Affected |
| openSUSE Leap 16.1 | jackson-core | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-annotations | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-core | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-databind | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-annotations | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-core | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-databind | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-annotations | Released |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-core | Released |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-databind | Released |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-annotations | Released |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-core | Released |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-databind | Released |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-annotations | Released |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-core | Released |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-databind | Released |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-annotations | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-core | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-databind | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-annotations | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-core | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-databind | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-annotations | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-core | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-databind | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-dataformats-binary | Released |
| SUSE Manager Server Module 4.3 | jackson-core | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | jackson-core | Affected |
| SUSE Enterprise Storage 7.1 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-annotations | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-core | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-databind | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-annotations | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-core | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-databind | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-dataformat-xml | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-dataformats-binary | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | jackson-core | Affected |
| SUSE Manager Proxy 4.1 | jackson-core | Affected |
| SUSE Manager Proxy 4.2 | jackson-core | Affected |
| SUSE Manager Proxy 4.3 | jackson-core | Affected |
| SUSE Manager Proxy LTS 4.3 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.1 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.2 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.3 | jackson-core | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | jackson-core | Affected |
| SUSE Manager Server 4.1 | jackson-core | Affected |
| SUSE Manager Server 4.2 | jackson-core | Affected |
| SUSE Manager Server 4.3 | jackson-core | Affected |
| SUSE Manager Server LTS 4.3 | jackson-core | Affected |
| openSUSE Leap 15.3 | jackson-core | Affected |
| openSUSE Leap 15.4 | jackson-core | Affected |
| openSUSE Leap 15.5 | jackson-core | Affected |
| openSUSE Leap 15.6 | jackson-core | Affected |
| Container Status | ||
| suse/multi-linux-manager/5.2/x86_64/server suse/multi-linux-manager/5.2/x86_64/server-attestation | jackson-core | Released |
| suse/manager/5.0/x86_64/server suse/manager/5.0/x86_64/server-attestation suse/multi-linux-manager/5.1/x86_64/server suse/multi-linux-manager/5.1/x86_64/server-attestation | jackson-core | In progress |
SUSE Timeline for this CVE
CVE page created: Thu Sep 17 16:05:28 2026CVE page last modified: Mon Oct 19 12:51:19 2026