Upstream information
Description
NumberInput.looksLikeValidNumber() in FasterXML jackson-core pre-validates "stringified numbers" with two regular expressions: PATTERN_FLOAT ([+-]?[0-9]*[\.]?[0-9]+([eE][+-]?[0-9]+)?), present since 2.17.0, and PATTERN_FLOAT_TRAILING_DOT, added in 2.17.2. PATTERN_FLOAT places adjacent quantifiers over the same character class -- an optional [0-9]* run, an optional dot, then a required [0-9]+ run -- so input that ultimately fails to match forces Java's backtracking engine to retry every possible split point of the digit run.Matching cost therefore grows with the square of the input length.
An attacker who can supply JSON that an application deserializes into a numeric target type reaches this method through jackson-databind's default String-to-number coercion (StdDeserializer and NumberDeserializers for BigDecimal, BigInteger, Double and Float).
Because StreamReadConstraints.maxStringLength defaults to 20,000,000 characters, no constraint bounds the input before it reaches the regex.
Testing by the reporter confirmed O(n^2) growth across five consecutive input-size doublings, with a single 160,000-character string consuming roughly 74 seconds in one call; a small number of concurrent requests of ordinary body size can therefore exhaust a server's request-handling thread pool.
The affected method does not exist before 2.17.0, so 2.16.x and earlier releases are not affected.
The fix replaces both regular expressions with a hand-rolled single-pass scan.
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 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP7 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP7 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 16.0 | jackson-core | Affected |
| SUSE Linux Enterprise Server 16.0 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 16.1 | jackson-core | Affected |
| SUSE Linux Enterprise Server 16.1 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | jackson-databind | Affected |
| openSUSE Leap 16.0 | jackson-core | Affected |
| openSUSE Leap 16.0 | jackson-databind | 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-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP5 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP6 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | jackson-databind | Affected |
| SUSE Manager Server Module 4.3 | jackson-core | Affected |
| SUSE Manager Server Module 4.3 | jackson-databind | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Enterprise Storage 7 | jackson-core | Affected |
| SUSE Enterprise Storage 7 | jackson-databind | Affected |
| SUSE Enterprise Storage 7.1 | jackson-core | Affected |
| SUSE Enterprise Storage 7.1 | jackson-databind | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | jackson-databind | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | jackson-core | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | jackson-databind | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-core | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | jackson-core | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3 | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | jackson-databind | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | jackson-core | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | jackson-databind | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | jackson-core | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | jackson-databind | Affected |
| SUSE Manager Proxy 4.1 | jackson-core | Affected |
| SUSE Manager Proxy 4.1 | jackson-databind | Affected |
| SUSE Manager Proxy 4.2 | jackson-core | Affected |
| SUSE Manager Proxy 4.2 | jackson-databind | Affected |
| SUSE Manager Proxy 4.3 | jackson-core | Affected |
| SUSE Manager Proxy 4.3 | jackson-databind | Affected |
| SUSE Manager Proxy LTS 4.3 | jackson-core | Affected |
| SUSE Manager Proxy LTS 4.3 | jackson-databind | Affected |
| SUSE Manager Retail Branch Server 4.1 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.1 | jackson-databind | Affected |
| SUSE Manager Retail Branch Server 4.2 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.2 | jackson-databind | Affected |
| SUSE Manager Retail Branch Server 4.3 | jackson-core | Affected |
| SUSE Manager Retail Branch Server 4.3 | jackson-databind | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | jackson-core | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | jackson-databind | Affected |
| SUSE Manager Server 4.1 | jackson-core | Affected |
| SUSE Manager Server 4.1 | jackson-databind | Affected |
| SUSE Manager Server 4.2 | jackson-core | Affected |
| SUSE Manager Server 4.2 | jackson-databind | Affected |
| SUSE Manager Server 4.3 | jackson-core | Affected |
| SUSE Manager Server 4.3 | jackson-databind | Affected |
| SUSE Manager Server LTS 4.3 | jackson-core | Affected |
| SUSE Manager Server LTS 4.3 | jackson-databind | Affected |
| openSUSE Leap 15.3 | jackson-core | Affected |
| openSUSE Leap 15.3 | jackson-databind | Affected |
| openSUSE Leap 15.4 | jackson-core | Affected |
| openSUSE Leap 15.4 | jackson-databind | Affected |
| openSUSE Leap 15.5 | jackson-core | Affected |
| openSUSE Leap 15.5 | jackson-databind | Affected |
| openSUSE Leap 15.6 | jackson-core | Affected |
| openSUSE Leap 15.6 | jackson-databind | Affected |
| Container Status | ||
| 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 suse/multi-linux-manager/5.2/x86_64/server suse/multi-linux-manager/5.2/x86_64/server-attestation | jackson-core | Affected |
| 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 suse/multi-linux-manager/5.2/x86_64/server suse/multi-linux-manager/5.2/x86_64/server-attestation | jackson-databind | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Sep 17 16:08:30 2026CVE page last modified: Tue Sep 22 20:57:14 2026