CVE-2026-86511 Details
Description
A vulnerability was found in java-json-tools jackson-coreutils 2.0. Affected by this vulnerability is the function BigDecimal.toPlainString of the file src/main/java/com/github/fge/jackson/JacksonUtils.java. Performing a manipulation results in resource consumption. The attack may be initiated remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
A denial-of-service vulnerability has been identified in java-json-tools jackson-coreutils version 2.0. The issue arises from the default ObjectMapper configuration, which enables the WRITE_BIGDECIMAL_AS_PLAIN feature. This vulnerability allows for uncontrolled resource consumption by amplifying the size of BigDecimal values during serialization. The problem can be triggered remotely by sending JSON data with large-exponent numbers, such as 1e100000. When the application processes this data, it can lead to significant memory allocation and cause an OutOfMemoryError, crashing the application.
Users can upgrade to Jackson version 2.15 or later, which introduces StreamWriteConstraints to prevent such amplification. Alternatively, the WRITE_BIGDECIMAL_AS_PLAIN feature can be disabled by removing it from the ObjectMapper's default configuration.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 8, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/java-json-tools/jackson-coreutils/ | [email protected] | ProductSource CodeVendor |
| https://github.com/java-json-tools/jackson-coreutils/issues/65 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://vuldb.com/cve/CVE-2026-86511 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/908322 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/399664 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/399664/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
| CWE-404 | Improper Resource Shutdown or Release | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| java-json-tools jackson-coreutils | 2.0 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 8, 2026 | New CVE Received | [email protected] |