CVE-2026-4636

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

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 27.5% of scored records. A rank, not a probability.

NVD base score

8.1 (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:N

NVD analysis status

Modified. NVD last modified this record on 2026-07-15.

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

2026-04-02 12:45Z5 MO AGO

Last updated

2026-07-15 00:50Z1 MO AGO

Reserved

2026-03-23

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

• CWE-551Incorrect Behavior Order: Authorization Before Parsing and CanonicalizationBase

Data version

5.2

Document digest

5a1825c0bf35357193ca4579d697b30355c7127f05d4b9796640113e5b1a6a48

• access.redhat.comRHSA-2026:6475https://access.redhat.com/errata/RHSA-2026:6475vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:6476https://access.redhat.com/errata/RHSA-2026:6476vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:6477https://access.redhat.com/errata/RHSA-2026:6477vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:6478https://access.redhat.com/errata/RHSA-2026:6478vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-4636vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2450251https://bugzilla.redhat.com/show_bug.cgi?id=2450251issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4636.jsonx_sadp-csaf-vex