CVE-2026-8467

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

2.11% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 81.6% of scored records. A rank, not a probability.

NVD base score

9.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-05-20 13:35Z5 MO AGO

Last updated

2026-05-27 15:41Z5 MO AGO

Reserved

2026-05-13

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Critical (CVSS 9.5)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

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

Data version

5.2

Document digest

5f80c0ad060a304ae91e26694d3bfab62fc727ce0ea6643be1f26b7738f1d47c

• github.comhttps://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-55hg-8qxv-qj4pvendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-8467.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-8467related
• github.comhttps://github.com/phenixdigital/phoenix_storybook/commit/56ab8464d4375fa52db806148a06cce126ad481dpatch