CVE-2026-66786

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

Not scored by EPSS

EPSS percentile

Not scored by EPSS

NVD base score

9.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

NVD analysis status

Received. NVD last modified this record on 2026-09-02.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-02 17:57Z10 HR AGO

Last updated

2026-09-02 17:57Z10 HR AGO

Reserved

2026-07-27

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.2

Document digest

296426229e6ef9e39b8ab48b9297a6226e92a1056789f479a57befafff5080b3

• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-66786vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2507531https://bugzilla.redhat.com/show_bug.cgi?id=2507531issue-trackingx_refsource_REDHAT