CVE-2026-86511 java-json-tools jackson-coreutils JacksonUtils.java BigDecimal.toPlainString resource consumption
Remote attackers can cause resource exhaustion in java-json-tools jackson-coreutils via BigDecimal.toPlainString, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86511?
CVE-2026-86511 is a medium-severity denial of service vulnerability in java-json-tools jackson-coreutils, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-86511?
How do I fix CVE-2026-86511?
No fix has been published for CVE-2026-86511 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86511 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86511 exists.
Sources
Also known as GHSA-2m62-p72c-jpc9.