# CVE-2026-86319: java-json-tools json-patch Patch Operation JsonPatch.java JsonPatch.apply resource consumption

> Remote attackers can cause resource exhaustion in java-json-tools json-patch via the JsonPatch.apply function, leading to denial of service.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Sep 2026
- **Updated:** 9 Sep 2026
- **Also known as:** GHSA-7fc8-9vq7-8mjg

## What is CVE-2026-86319?

CVE-2026-86319 is a medium-severity denial of service vulnerability in java-json-tools json-patch, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in java-json-tools json-patch up to 1.13. Affected by this vulnerability is the function JsonPatch.apply of the file src/main/java/com/github/fge/jsonpatch/JsonPatch.java of the component Patch Operation Handler. The manipulation leads to resource consumption. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-404 (Improper Resource Shutdown or Release), CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2026-86319?


## How do I fix CVE-2026-86319?

No fix has been published for CVE-2026-86319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86319 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86319 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86319 and fix it if it is affected.

What it is: CVE-2026-86319 is a medium-severity denial of service vulnerability in java-json-tools json-patch, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86319 exists.

Affected product: java-json-tools json-patch. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-86319/ (Markdown: https://insights.sbomify.com/CVE-2026-86319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86319
- OSV: https://osv.dev/vulnerability/CVE-2026-86319

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-86319/
Summaries are generated and may contain mistakes; the official description above is the record.