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On December 11th, the Storybook team received a responsible disclosure alerting them to a potential vulnerability in certain built and published Storybooks.
The vulnerability is a bug in how Storybook handles environment variables defined in a .env file, which could, in specific circumstances, lead to those variables being unexpectedly bundled into the artifacts created by the storybook build command. When a built Storybook is published to the web, the bundle’s source is viewable, thus potentially exposing those variables to anyone with access. If those variables contained secrets, they should be considered compromised.
Who is impacted?
For a project to be vulnerable to this issue, it must:
Build the Storybook (i.e. run storybook build directly or indirectly) in a directory that contains a .env file (including variants like .env.local)
The .env file contains sensitive secrets
Use Storybook version 7.0.0 or above
Publish the built Storybook to the web
Storybooks built without a .env file at build time are not affected, including common CI-based builds where secrets are provided via platform environment variables rather than .env files.
Users' Storybook runtime environments (i.e. storybook dev) are not affected. Deployed applications that share a repo with a project's Storybook are not affected.
Storybook 6 and below are not affected.
Recommended actions
First, Storybook recommends that everyone audit for any sensitive secrets provided via .env files and rotate those keys.
Second, Storybook has released patched versions of all affected major Storybook versions that no longer have this vulnerability. Projects should upgrade their Storybook—on both local machines and CI environments—to one of these versions before publishing again.
10.1.10+
9.1.17+
8.6.15+
7.6.21+
Finally, some projects may have been relying on the undocumented behavior at the heart of this issue and will need to change how they reference environment variables after this update. If a project can no longer read necessary environmental variable values, it can either prefix the variables with STORYBOOK_ or use the env property in Storybook’s configuration to manually specify values. In either case, do not include sensitive secrets as they will be included in the built bundle.
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This PR contains the following updates:
9.1.5→9.1.17Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
GitHub Vulnerability Alerts
CVE-2025-68429
On December 11th, the Storybook team received a responsible disclosure alerting them to a potential vulnerability in certain built and published Storybooks.
The vulnerability is a bug in how Storybook handles environment variables defined in a
.envfile, which could, in specific circumstances, lead to those variables being unexpectedly bundled into the artifacts created by thestorybook buildcommand. When a built Storybook is published to the web, the bundle’s source is viewable, thus potentially exposing those variables to anyone with access. If those variables contained secrets, they should be considered compromised.Who is impacted?
For a project to be vulnerable to this issue, it must:
storybook builddirectly or indirectly) in a directory that contains a.envfile (including variants like.env.local).envfile contains sensitive secrets7.0.0or aboveStorybooks built without a
.envfile at build time are not affected, including common CI-based builds where secrets are provided via platform environment variables rather than.envfiles.Users' Storybook runtime environments (i.e.
storybook dev) are not affected. Deployed applications that share a repo with a project's Storybook are not affected.Storybook 6 and below are not affected.
Recommended actions
First, Storybook recommends that everyone audit for any sensitive secrets provided via
.envfiles and rotate those keys.Second, Storybook has released patched versions of all affected major Storybook versions that no longer have this vulnerability. Projects should upgrade their Storybook—on both local machines and CI environments—to one of these versions before publishing again.
10.1.10+9.1.17+8.6.15+7.6.21+Finally, some projects may have been relying on the undocumented behavior at the heart of this issue and will need to change how they reference environment variables after this update. If a project can no longer read necessary environmental variable values, it can either prefix the variables with
STORYBOOK_or use theenvproperty in Storybook’s configuration to manually specify values. In either case, do not include sensitive secrets as they will be included in the built bundle.Further information
Details of the vulnerability can be found on the Storybook announcement.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LRelease Notes
storybookjs/storybook (storybook)
v9.1.17Compare Source
v9.1.16Compare Source
v9.1.15Compare Source
preview-first-loadtelemetry - #32770, thanks @shilman!vite-plugin-storybook-nextjs- #32821, thanks @ndelangen!v9.1.14Compare Source
play-fntag for methods - #32695, thanks @shilman!v9.1.13Compare Source
v9.1.12Compare Source
v9.1.11Compare Source
sb.mockusage in Storybook's deployed in subpaths - #32678, thanks @valentinpalkovic!v9.1.10Compare Source
v9.1.9Compare Source
HTMLAttributesdocgen when using utility types - #32173, thanks @steciuk!v9.1.8Compare Source
nodeentry point - #32534, thanks @ndelangen!v9.1.7Compare Source
vite-plugin-storybook-nextjsto 2.0.7 - #32331, thanks @k35o!@ts-expect-errorin preview - #32442, thanks @mrginglymus!v9.1.6Compare Source
create-storybook- #32344, thanks @shilman!Configuration
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