chore(deps): update pnpm.catalog.runtime defu to v6.1.5 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
defu	6.1.4 → 6.1.5

GitHub Vulnerability Alerts

CVE-2026-35209

Impact

Applications that pass unsanitized user input (e.g. parsed JSON request bodies, database records, or config files from untrusted sources) as the first argument to defu() are vulnerable to prototype pollution.

A crafted payload containing a __proto__ key can override intended default values in the merged result:

import { defu } from 'defu'

const userInput = JSON.parse('{"__proto__":{"isAdmin":true}}')
const config = defu(userInput, { isAdmin: false })

config.isAdmin // true — attacker overrides the server default

Root Cause

The internal _defu function used Object.assign({}, defaults) to copy the defaults object. Object.assign invokes the __proto__ setter, which replaces the resulting object's [[Prototype]] with attacker-controlled values. Properties inherited from the polluted prototype then bypass the existing __proto__ key guard in the for...in loop and land in the final result.

Fix

Replace Object.assign({}, defaults) with object spread ({ ...defaults }), which uses [[DefineOwnProperty]] and does not invoke the __proto__ setter.

Affected Versions

<= 6.1.4

Credits

Reported by @​BlackHatExploitation

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defu: Prototype pollution via __proto__ key in defaults argument

CVE-2026-35209 / GHSA-737v-mqg7-c878

More information

Details

Impact

Applications that pass unsanitized user input (e.g. parsed JSON request bodies, database records, or config files from untrusted sources) as the first argument to defu() are vulnerable to prototype pollution.

A crafted payload containing a __proto__ key can override intended default values in the merged result:

import { defu } from 'defu'

const userInput = JSON.parse('{"__proto__":{"isAdmin":true}}')
const config = defu(userInput, { isAdmin: false })

config.isAdmin // true — attacker overrides the server default

Root Cause

The internal _defu function used Object.assign({}, defaults) to copy the defaults object. Object.assign invokes the __proto__ setter, which replaces the resulting object's [[Prototype]] with attacker-controlled values. Properties inherited from the polluted prototype then bypass the existing __proto__ key guard in the for...in loop and land in the final result.

Fix

Replace Object.assign({}, defaults) with object spread ({ ...defaults }), which uses [[DefineOwnProperty]] and does not invoke the __proto__ setter.

Affected Versions

<= 6.1.4

Credits

Reported by @​BlackHatExploitation

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

• https://github.com/unjs/defu/security/advisories/GHSA-737v-mqg7-c878
• https://nvd.nist.gov/vuln/detail/CVE-2026-35209
• https://github.com/unjs/defu/pull/156
• https://github.com/unjs/defu/commit/3942bfbbcaa72084bd4284846c83bd61ed7c8b29
• https://github.com/unjs/defu
• https://github.com/unjs/defu/releases/tag/v6.1.5

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

unjs/defu (defu)

v6.1.5

Compare Source

compare changes

🩹 Fixes

• Prevent prototype pollution via __proto__ in defaults (#​156)
• Ignore inherited enumerable properties (11ba022)

🏡 Chore

• Add tea.yaml (70cffe5)
• Update repo (23cc432)
• Fix typecheck (89df6bb)

✅ Tests

• Add more tests for plain objects (b65f603)

🤖 CI

• Bump node (9237d9c)

❤️ Contributors

• Pooya Parsa (@​pi0)
• Kricsleo (@​kricsleo)

---

Configuration

📅 Schedule: Branch creation - "" in timezone Europe/Copenhagen, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: pnpm-lock.yaml

Scope: all 32 workspace projects
Progress: resolved 1, reused 0, downloaded 0, added 0
Progress: resolved 75, reused 0, downloaded 0, added 0
Progress: resolved 207, reused 0, downloaded 0, added 0
Progress: resolved 432, reused 0, downloaded 0, added 0
/tmp/renovate/repos/github/ucdjs/ucd/packages/shared-ui:
 ERR_PNPM_TRUST_DOWNGRADE  High-risk trust downgrade for "reselect@5.1.1" (possible package takeover)

This error happened while installing the dependencies of @base-ui/utils@0.2.6

Trust checks are based solely on publish date, not semver. A package cannot be installed if any earlier-published version had stronger trust evidence. Earlier versions had provenance attestation, but this version has no trust evidence. A trust downgrade may indicate a supply chain incident.

[github-actions]

🌏 Preview Deployments

Application	Status	Preview URL
API	⏳ In Progress	N/A
Store	⏳ In Progress	N/A
Website	⏳ In Progress	N/A
Documentation	⏳ In Progress	N/A

Built from commit: d87f0e9e0ef561b26b1154f1d1d9166f9ae43364

---

_{🤖 This comment will be updated automatically when you push new commits to this PR.}

[socket-security]

All alerts resolved. Learn more about Socket for GitHub.

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

View full report

[socket-security]

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

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	class-variance-authority@​0.7.1
	fumadocs-mdx@​14.2.11
	fumadocs-core@​16.7.7
	fumadocs-ui@​16.7.7
	farver@​0.4.2
	chokidar@​5.0.0
	crossws@​0.4.4
	cac@​7.0.0
	h3@​2.0.1-rc.20
	drizzle-orm@​1.0.0-beta.20
	hookable@​6.1.0
	eslint-plugin-format@​2.0.1
	eslint-plugin-react-refresh@​0.5.2
	eslint@​10.1.0
	drizzle-kit@​1.0.0-beta.20
	hono@​4.12.9
	eslint-plugin-react-hooks@​7.0.1

View full report