SSRF in Java-Json-Tools Jackson-Coreutils
CVE-2026-86321
A vulnerability was found in java-json-tools jackson-coreutils 2.0. Affected by this issue is the function JsonLoader.fromURL of the file src/main/java/com/github/fge/jackson/JsonLoader.java of the component URL Validation. The manipulation results in server-side request forgery. It is possible to launch the attack 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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (51.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Java-Json-Tools Jackson-Coreutils — versions 2.0
Weakness classification (CWE)
References
- vuldb.com/vuln/399511 (technical-description, vdb-entry)
- vuldb.com/vuln/399511/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86321 (third-party-advisory)
- vuldb.com/submit/908323 (third-party-advisory)
- github.com/java-json-tools/jackson-coreutils/issues/64 (issue-tracking, exploit)
- github.com/java-json-tools/jackson-coreutils/ (product)
Frequently asked questions
- What is CVE-2026-86321?
- CVE-2026-86321 is a medium-severity vulnerability in Java-Json-Tools Jackson-Coreutils, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-09-07.
- How severe is CVE-2026-86321?
- Medium severity. CVSS v3 base score is 5.3 out of 10.