CVE-2026-8467
- Source
- https://cve.org/CVERecord?id=CVE-2026-8467
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8467.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-8467
- Aliases
- Published
- 2026-05-20T13:35:29.018Z
- Modified
- 2026-07-08T08:13:52.185476497Z
- 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
-
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
{ "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "e35379dfe2ef1a71b141899e36f431017c55265d" }, { "fixed": "56ab8464d4375fa52db806148a06cce126ad481d" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8467.json", "cna_assigner": "EEF", "cwe_ids": [ "CWE-94" ] }- References
-
- https://cna.erlef.org/cves/CVE-2026-8467.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-8467
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8467.json
- https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-55hg-8qxv-qj4p
- https://nvd.nist.gov/vuln/detail/CVE-2026-8467
- https://github.com/phenixdigital/phoenix_storybook/commit/56ab8464d4375fa52db806148a06cce126ad481d
- https://github.com/phenixdigital/phoenix_storybook