EEF-CVE-2026-8467
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-8467.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-8467.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-8467
- Aliases
-
- CVE-2026-8467
- GHSA-55hg-8qxv-qj4p
- Published
- 2026-05-20T13:35:29.018Z
- Modified
- 2026-05-20T13:56:23.273071966Z
- Severity
-
- 9.5 (Critical) CVSS_V4 - 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 CVSS Calculator
- Summary
- Unauthenticated remote code execution via HEEx template injection in phoenix_storybook playground
- Details
-
Summary
Code Injection vulnerability in phenixdigital phoenix_storybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation.
The psb-assign WebSocket event handler in 'Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive':handleevent/3 accepts arbitrary attribute names and values from unauthenticated clients. These values are passed to 'Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers':handlesetvariationassign/3, which stores them verbatim. When rendering, 'Elixir.PhoenixStorybook.Rendering.ComponentRenderer':attributesmarkup/1 interpolates binary attribute values directly into a HEEx template string as name="<val>" without escaping double quotes or HEEx expression delimiters. An attacker can supply a value containing a closing quote followed by a HEEx expression block (e.g. foo" injected={EXPR} bar="), which causes EXPR to be treated as an inline Elixir expression. The resulting template is compiled via EEx.compilestring/2 and executed via Code.evalquotedwith_env/3 with full Kernel imports and no sandbox, giving the attacker arbitrary code execution on the server.
This issue affects phoenix_storybook from 0.5.0 before 1.1.0.
- Database specific
{ "cwe_ids": [ "CWE-94" ], "capec_ids": [ "CAPEC-242" ], "cpe_ids": [ "cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:*" ] }- References
- Credits
-
-
- Nick Mykhailyshyn - FINDER
-
- Cenk Kücük - ANALYST
-
- Christian Blavier - REMEDIATION_DEVELOPER
-
- Jonatan Männchen - COORDINATOR
-
Affected packages
Hex / phoenix_storybook
Package
- Name
- phoenix_storybook
- Purl
- pkg:hex/phoenix_storybook