CVE-2026-40466

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

4.78% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 91.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-26.

Red Hat severity

Important. 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

2026-04-24 10:15Z6 MO AGO

Last updated

2026-07-15 01:00Z3 MO AGO

Reserved

2026-04-13

Assigning CNA

apache

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.2

Document digest

0b9231c82132f4d4f34d1bbf172a1589f739d915087c07ce2d07699610e703e7

• activemq.apache.orghttps://activemq.apache.org/security-advisories.data/CVE-2026-34197-announcement.txtvendor-advisory
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-40466vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2461410https://bugzilla.redhat.com/show_bug.cgi?id=2461410issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40466.jsonx_sadp-csaf-vex