chore(deps): update dependency devalue@>=5.3.0 <=5.6.1 to >=5.6.4 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
devalue@>=5.3.0 <=5.6.1	[>=5.6.3 → >=5.6.4](https://renovatebot.com/diffs/npm/devalue@&gt;&#x3D;5.3.0 <=5.6.1/5.6.3/5.6.4)

GitHub Vulnerability Alerts

CVE-2026-30226

In devalue v5.6.3, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion.

GHSA-mwv9-gp5h-frr4

In some circumstances, devalue.parse and devalue.unflatten could emit objects with __proto__ own properties. This in and of itself is not a security vulnerability (and is possible with, for example, JSON.parse as well), but it can result in prototype injection if downstream code handles it incorrectly:

const result = devalue.parse(/* input creating an object with a __proto__ property */);
const target = {};
Object.assign(target, result); // target's prototype is now polluted

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devalue has prototype pollution in devalue.parse and devalue.unflatten

CVE-2026-30226 / GHSA-cfw5-2vxh-hr84

More information

Details

In devalue v5.6.3, devalue.parse and devalue.unflatten were susceptible to prototype pollution via maliciously crafted payloads. Successful exploitation could lead to Denial of Service (DoS) or type confusion.

Severity

• CVSS Score: 6.3 / 10 (Medium)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

References

• https://github.com/sveltejs/devalue/security/advisories/GHSA-cfw5-2vxh-hr84
• https://nvd.nist.gov/vuln/detail/CVE-2026-30226
• https://github.com/sveltejs/devalue

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

---

Sveltejs devalue's devalue.parse and devalue.unflatten emit objects with __proto__ own properties

GHSA-mwv9-gp5h-frr4

More information

Details

In some circumstances, devalue.parse and devalue.unflatten could emit objects with __proto__ own properties. This in and of itself is not a security vulnerability (and is possible with, for example, JSON.parse as well), but it can result in prototype injection if downstream code handles it incorrectly:

const result = devalue.parse(/* input creating an object with a __proto__ property */);
const target = {};
Object.assign(target, result); // target's prototype is now polluted

Severity

• CVSS Score: 2.7 / 10 (Low)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

References

• https://github.com/sveltejs/devalue/security/advisories/GHSA-mwv9-gp5h-frr4
• https://github.com/sveltejs/devalue
• https://github.com/sveltejs/devalue/releases/tag/v5.6.4

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

---

Release Notes

sveltejs/devalue (devalue@>=5.3.0 <=5.6.1)

v5.6.4

Compare Source

Patch Changes

• 87c1f3c: fix: reject __proto__ keys in malformed Object wrapper payloads

  This validates the "Object" parse path and throws when the wrapped value has an own __proto__ key.

• 40f1db1: fix: ensure sparse array indices are integers

• 87c1f3c: fix: disallow __proto__ keys in null-prototype object parsing

  This disallows __proto__ keys in the "null" parse path so null-prototype object hydration cannot carry that key through parse/unflatten.

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Configuration

📅 Schedule: Branch creation - "" in timezone America/New_York, Automerge - Monday through Friday ( * * * * 1-5 ) in timezone America/New_York.

🚦 Automerge: Enabled.

♻ 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.

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