fix(content): sanitize content data with comark and stop spreading it by larbish · Pull Request #2471 · nuxt/nuxt.com

larbish · 2026-10-12T21:29:36Z

Content data (frontmatter, YAML, JSON) was spread into components and bound as links, so a previewed PR could inject attributes and script URLs.

sanitizeData() from comark/utils now sanitizes every file's data, after the other plugins: YAML/JSON not covered by security()
script URLs are also dropped under any key, as templates bind demo or website as links
one SECURITY_OPTIONS drives both security() and the custom data sanitizer plugin
content reaches components through pickLink() / pickLinks() / pickFeature() / pickUser() / pickAvatar() instead of v-bind spreads, so only allowlisted keys reach the DOM
bumps comark to 0.8.1, which ships fix(security): sanitize frontmatter, tag selectors and data URLs comarkdown/comark#486
comark 0.8 generates flat heading ids (#prerequisites, not #new-project-prerequisites), matching the anchors the docs link to

🤖 Generated with Claude Code, reviewed by @larbish before opening.

vercel · 2026-10-12T21:29:42Z

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Project	Deployment	Actions	Updated
nuxt	Ready	Preview	Oct 21, 2026 1:53pm UTC

coderabbitai · 2026-10-12T21:31:52Z

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📝 Walkthrough

The content parser cache version changes from v7 to v8. A new sanitizer removes unsafe keys and values from parsed file data. The shared content plugin setup configures the sanitizer with the blocked tags. Unit tests cover removal behavior, warnings, and plugin ordering.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🔵 Low · up to 59004

The PR hardens content rendering, but it temporarily relaxes pnpm's guard against exotic dependency sources and depends on preview comark packages. Switch to the released comark packages and remove the opt-out before or shortly after merging.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 46.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 6 files. (15 skipped:…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Title check		The title clearly summarizes the main changes: content sanitization with comark and replacing unsafe prop spreading with allowlisted properties.
Description check		The description directly explains the sanitization changes, shared security options, allowlisted component props, dependency updates, and heading ID changes.

Full details: Docstring Coverage

Explanation

Docstring coverage is 46.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 6 files. (15 skipped: 15 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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nuxt-com-bundle-report · 2026-10-12T21:38:38Z

Production bundle

Comparing d3e35cb8 with 89881a6a. Compressed sizes are calculated from the emitted production assets.

Initial page load

Page	Base JS (Brotli)	PR JS (Brotli)	Δ JS	Δ CSS	Δ files
`/`	553.1 KiB	550.0 KiB	-3.1 KiB (-0.6%)	—	—
`/docs/4.x/getting-started/introduction`	614.8 KiB	611.7 KiB	-3.1 KiB (-0.5%)	—	—
`/modules/ui`	545.4 KiB	542.3 KiB	-3.1 KiB (-0.6%)	—	—
`/updates`	449.2 KiB	449.4 KiB	+192 B (+0.0%)	—	—
`/blog/v4-6`	575.5 KiB	572.3 KiB	-3.1 KiB (-0.5%)	—	—
`/templates`	430.0 KiB	430.2 KiB	+219 B (+0.0%)	—	—

Entry script, modulepreload chunks and stylesheets referenced by the prerendered HTML. Lazy and prefetched chunks are excluded.

All client assets

Metric	Base (Brotli)	PR (Brotli)	Δ Brotli	Δ gzip
Client JavaScript	2.18 MiB	2.18 MiB	-2.1 KiB (-0.1%)	-4.0 KiB (-0.1%)
Client CSS	33.3 KiB	33.3 KiB	—	—
Other client assets	339.3 KiB	339.3 KiB	—	+1 B (+0.0%)
Total client assets	2.54 MiB	2.54 MiB	-2.1 KiB (-0.1%)	-4.0 KiB (-0.1%)

Largest module increases

Module	Base (Brotli)	PR (Brotli)	Δ Brotli
`node_modules/comark/dist/internal/parse/tree.js`	0 B	3.7 KiB	+3.7 KiB
`node_modules/comark/dist/internal/sanitize.js`	0 B	2.5 KiB	+2.5 KiB
`node_modules/comark/dist/plugins/html.js`	264 B	1.7 KiB	+1.4 KiB (+540.9%)
`node_modules/comark/dist/internal/parse/utils.js`	0 B	1.2 KiB	+1.2 KiB
`node_modules/comark/dist/internal/parse/tree-utils.js`	0 B	1.1 KiB	+1.1 KiB
`node_modules/comark/dist/internal/heading-id.js`	0 B	631 B	+631 B
`node_modules/comark/dist/plugins/rangi.js`	1.6 KiB	2.0 KiB	+461 B (+28.4%)
`virtual:nuxt-workers.mjs?source=%2Fhome%2Frunner%2Fwork%2Fnuxt.com%2Fnuxt.com%2Fapp%2Fworkers%2Fsearch.ts`	0 B	408 B	+408 B
`node_modules/comark/dist/utils/index.js`	956 B	1.3 KiB	+353 B (+36.9%)
`node_modules/comark/dist/parse.js`	1.2 KiB	1.5 KiB	+317 B (+25.2%)

Module values come from Nuxt’s analyzer and are attribution estimates. This workflow is currently report-only.

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Review comments at @server/utils/content/plugins/sanitize-data.ts:
- Line 35: Update isUnsafeUrl to parse the URL and reject any value whose
protocol is data: before checking UNSAFE_URL_PREFIXES against the normalized
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server/utils/content/plugins/sanitize-data.ts
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Inline comments:
Review comments at @pnpm-workspace.yaml:
- Line 5: Once the comark release associated with comarkdown/comark#486 is
available, remove the blockExoticSubdeps opt-out from the pnpm workspace
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📒 Files selected for processing: 20

app/components/content/enterprise/support/EnterpriseSupportClientCard.vue
app/components/content/enterprise/support/EnterpriseSupportFormSection.vue
app/pages/blog/[slug].vue
app/pages/blog/index.vue
app/pages/design-kit.vue
app/pages/docs/[...slug].vue
app/pages/enterprise/agencies/index.vue
app/pages/enterprise/jobs.vue
app/pages/enterprise/sponsors.vue
app/pages/enterprise/support.vue
app/pages/index.vue
app/pages/newsletter.vue
app/pages/templates.vue
app/pages/video-courses.vue
app/utils/content.ts
pnpm-workspace.yaml
server/utils/content/plugins/index.ts
server/utils/content/plugins/sanitize-data.ts
test/unit/content-sanitize-data.spec.ts
utils/factory.ts

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socket-security · 2026-10-21T13:51:00Z

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@comark/nuxt@0.7.0 ⏵ 0.8.1	⁺⁴

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fix(content): strip unsafe keys from content data

1c2b72a

larbish requested a review from atinux as a code owner October 12, 2026 21:29

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handle more cases

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Comment thread server/utils/content/plugins/sanitize-data.ts Outdated

reject every data URL

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review: only log in dev

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larbish marked this pull request as draft October 13, 2026 13:24

fix(content): sanitize content data with comark and stop spreading it

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larbish changed the title ~~fix(content): strip unsafe keys from content data~~ fix(content): sanitize content data with comark and stop spreading it Oct 13, 2026

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pin the comark preview packages to a commit

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larbish marked this pull request as ready for review October 13, 2026 20:46

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Merge branch 'main' into fix/sanitize-data

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Merge remote-tracking branch 'origin/main' into fix/sanitize-data

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atinux approved these changes Oct 21, 2026

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Merge branch 'main' into fix/sanitize-data

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switch comark to the 0.8.1 release

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larbish merged commit 53edde3 into main Oct 21, 2026
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larbish deleted the fix/sanitize-data branch October 21, 2026 14:48

This was referenced Oct 22, 2026

docs: update anchors for flat heading ids nuxt/nuxt#36664

Merged

docs: fix anchors for flat heading ids nuxt/nuxt#36665

Merged

docs: fix anchors for flat heading ids nuxt/nuxt#36667

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docs: fix anchors for flat heading ids nuxt/nuxt#36668

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fix(content): sanitize content data with comark and stop spreading it - #2471

fix(content): sanitize content data with comark and stop spreading it#2471
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