Is CVE-2026-100273 being exploited in the wild?

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

Is CVE-2026-100273 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: patch in the next maintenance window, because of its high severity, although no exploitation is known.

Critical

In JetBrains YouTrack before 2026.2.19197 authorisation bypass in the scripts debugger allowed arbitrary code execution

Published Sep 30, 2026 · Updated Oct 2, 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

Patch in the next maintenance window

CVE-2026-100273 is a critical-severity vulnerability (CVSS 9.8).
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: patch in the next maintenance window, because of its high severity, although no exploitation is known.

CVSS

9.8

EPSS (30-day exploit likelihood)

n/a

Exploit maturity

None known

ATLAS score

n/a

Outside the curated set

FAQ

In JetBrains YouTrack before 2026.2.19197 authorisation bypass in the scripts debugger allowed arbitrary code execution
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: patch in the next maintenance window, because of its high severity, although no exploitation is known.

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