CVE-2026-42999

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 ImpactpartialSuccessful exploitation gives limited 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

0.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 25.8% 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

2026-05-28 00:00Z5 MO AGO

Last updated

2026-07-24 12:05Z3 MO AGO

Reserved

2026-05-01

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 6.0)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass
• CWE-639Authorization Bypass Through User-Controlled KeyBase

Data version

5.2

Document digest

a2043e1812862e35e87d3630e33513c7bb76bbbeaa444ea928083a4e647101ef

• bugs.launchpad.nethttps://bugs.launchpad.net/keystone/+bug/2148398
• security.openstack.orghttps://security.openstack.org/ossa/OSSA-2026-015.html
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-42999vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2482840https://bugzilla.redhat.com/show_bug.cgi?id=2482840issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42999.jsonx_sadp-csaf-vex