CVE•Published 2026-10-19•Modified 2026-10-20•1 article on news•5 live references•NVD data
CVE-2026-71253
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
Description
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.
Timeline
Published 2026-10-19
Modified 2026-10-20
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-71253Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-71253Censys host search filtered to this CVE id.
grep.app
CVE-2026-71253Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-71253GitHub code search for direct mentions.
Google dork
"CVE-2026-71253" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-71253 on GitHub.