Vulnerability · Published Sep 8, 2026 · Assigned by VulDB

CVE-2026-86511java-json-tools jackson-coreutils JacksonUtils.java BigDecimal.toPlainString resource consumption

Medium 5.3

In plain English

A medium-severity uncontrolled resource consumption in jackson-coreutils from java-json-tools. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.7%top 46.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
java-json-tools	jackson-coreutils	2.0

Weakness: CWE-400, CWE-404 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

References

VDB-399664 | java-json-tools jackson-coreutils JacksonUtils.java BigDecimal.toPlainString resource consumption vdb-entry, technical-description
VDB-399664 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-86511 | CVE Analysis and Report third-party-advisory
Submit #908322 | java-json-tools jackson-coreutils 2.0 BigDecimal Amplification DoS third-party-advisory
https://github.com/java-json-tools/jackson-coreutils/issues/65 exploit, issue-tracking
https://github.com/java-json-tools/jackson-coreutils/ product