CVE-2026-71253Apache Johnzon: ClassConverter loads & static-initializes an attacker-named class from untrusted JSON
Updated under an hour ago ()
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It affects Apache Software Foundation Apache Johnzon. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon. ClassConverter loads & static-initializes an attacker-named class from untrusted JSON. This issue affects Apache Johnzon: from 1.0.0 before 2.2.0. Users are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.
- CVSS
- Not yet scored
- Weakness (CWE)
- CWE-470
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apache
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 19, 2026
Affected products
Apache Software Foundation Apache Johnzon apache_software_foundation:apache_johnzon (from the name) | from 2.0.0 before 2.2.0; from 1.0.0 before 1.3.1 | CNA record |
References
- https://github.com/apache/johnzon/commit/dd3d00634c746a2173a2518e882e85e8a151bf30patch
- https://github.com/apache/johnzon/commit/91e7b0d21d08d138944e2570691939739422a3d6patch
- https://lists.apache.org/thread.html/3vgm1yo2sn9yhkvvs9lc4ro01vl3zt68vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.