Is CVE-2026-71253 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2026-71253 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

No public exploit code is known.

No fixed version is listed yet; check the vendor advisory for mitigations.

Brandefense priority: routine patching, as no exploitation is known and no severity score has been published yet.

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.

Published Oct 19, 2026 · Updated Oct 19, 2026

The full analysis for this CVE is not ready yet, so this page shows the scores and scope from the public record. How CVEs are selected

Routine patching

CVE-2026-71253 is a vulnerability.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and no severity score has been published yet.

CVSS

n/a

EPSS (30-day exploit likelihood)

n/a

Exploit maturity

None known

ATLAS score

n/a

Outside the curated set

FAQ

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and no severity score has been published yet.

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.