chore(deps): update dependency lodash-es to v4.18.1 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
lodash-es (source)	4.17.21 → 4.18.1

---

Lodash has Prototype Pollution Vulnerability in _.unset and _.omit functions

CVE-2025-13465 / GHSA-xxjr-mmjv-4gpg

More information

Details

Impact

Lodash versions 4.0.0 through 4.17.22 are vulnerable to prototype pollution in the _.unset and _.omit functions. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes.

The issue permits deletion of properties but does not allow overwriting their original behavior.

Patches

This issue is patched on 4.17.23.

Severity

• CVSS Score: 6.9 / 10 (Medium)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:H/SI:H/SA:H/E:P

References

• https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg
• https://nvd.nist.gov/vuln/detail/CVE-2025-13465
• https://github.com/lodash/lodash/commit/edadd452146f7e4bad4ea684e955708931d84d81
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html
• https://github.com/advisories/GHSA-xxjr-mmjv-4gpg

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

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lodash vulnerable to Code Injection via _.template imports key names

CVE-2026-4800 / GHSA-r5fr-rjxr-66jc

More information

Details

Impact

The fix for CVE-2021-23337 added validation for the variable option in _.template but did not apply the same validation to options.imports key names. Both paths flow into the same Function() constructor sink.

When an application passes untrusted input as options.imports key names, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time.

Additionally, _.template uses assignInWith to merge imports, which enumerates inherited properties via for..in. If Object.prototype has been polluted by any other vector, the polluted keys are copied into the imports object and passed to Function().

Patches

Users should upgrade to version 4.18.0.

The fix applies two changes:

1. Validate importsKeys against the existing reForbiddenIdentifierChars regex (same check already used for the variable option)
2. Replace assignInWith with assignWith when merging imports, so only own properties are enumerated

Workarounds

Do not pass untrusted input as key names in options.imports. Only use developer-controlled, static key names.

Severity

• CVSS Score: 8.1 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

• https://github.com/lodash/lodash/security/advisories/GHSA-r5fr-rjxr-66jc
• https://nvd.nist.gov/vuln/detail/CVE-2026-4800
• https://github.com/lodash/lodash/commit/3469357cff396a26c363f8c1b5a91dde28ba4b1c
• https://cna.openjsf.org/security-advisories.html
• https://github.com/advisories/GHSA-35jh-r3h4-6jhm
• https://github.com/advisories/GHSA-r5fr-rjxr-66jc

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

---

lodash vulnerable to Prototype Pollution via array path bypass in _.unset and _.omit

CVE-2026-2950 / GHSA-f23m-r3pf-42rh

More information

Details

Impact

Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions. The fix for CVE-2025-13465 only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. This allows deletion of properties from built-in prototypes such as Object.prototype, Number.prototype, and String.prototype.

The issue permits deletion of prototype properties but does not allow overwriting their original behavior.

Patches

This issue is patched in 4.18.0.

Workarounds

None. Upgrade to the patched version.

Severity

• CVSS Score: 6.5 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

• https://github.com/lodash/lodash/security/advisories/GHSA-f23m-r3pf-42rh
• https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg
• https://nvd.nist.gov/vuln/detail/CVE-2026-2950
• https://github.com/advisories/GHSA-f23m-r3pf-42rh

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

---

Release Notes

lodash/lodash (lodash-es)

v4.18.1

Compare Source

Bugs

Fixes a ReferenceError issue in lodash lodash-es lodash-amd and lodash.template when using the template and fromPairs functions from the modular builds. See #​6167 (comment)

These defects were related to how lodash distributions are built from the main branch using https://github.com/lodash-archive/lodash-cli. When internal dependencies change inside lodash functions, equivalent updates need to be made to a mapping in the lodash-cli. (hey, it was ahead of its time once upon a time!). We know this, but we missed it in the last release. It's the kind of thing that passes in CI, but fails bc the build is not the same thing you tested.

There is no diff on main for this, but you can see the diffs for each of the npm packages on their respective branches:

• lodash: lodash/lodash@4.18.0-npm...4.18.1-npm
• lodash-es: lodash/lodash@4.18.0-es...4.18.1-es
• lodash-amd: lodash/lodash@4.18.0-amd...4.18.1-amd
• lodash.templatelodash/lodash@4.18.0-npm-packages...4.18.1-npm-packages

v4.18.0

Compare Source

v4.18.0

Full Changelog: lodash/lodash@4.17.23...4.18.0

Security

_.unset / _.omit: Fixed prototype pollution via constructor/prototype path traversal (GHSA-f23m-r3pf-42rh, fe8d32e). Previously, array-wrapped path segments and primitive roots could bypass the existing guards, allowing deletion of properties from built-in prototypes. Now constructor and prototype are blocked unconditionally as non-terminal path keys, matching baseSet. Calls that previously returned true and deleted the property now return false and leave the target untouched.

_.template: Fixed code injection via imports keys (GHSA-r5fr-rjxr-66jc, CVE-2026-4800, 879aaa9). Fixes an incomplete patch for CVE-2021-23337. The variable option was validated against reForbiddenIdentifierChars but importsKeys was left unguarded, allowing code injection via the same Function() constructor sink. imports keys containing forbidden identifier characters now throw "Invalid imports option passed into _.template".

Docs

• Add security notice for _.template in threat model and API docs (#​6099)
• Document lower > upper behavior in _.random (#​6115)
• Fix quotes in _.compact jsdoc (#​6090)

lodash.* modular packages

Diff

We have also regenerated and published a select number of the lodash.* modular packages.

These modular packages had fallen out of sync significantly from the minor/patch updates to lodash. Specifically, we have brought the following packages up to parity w/ the latest lodash release because they have had CVEs on them in the past:

• lodash.orderby
• lodash.tonumber
• lodash.trim
• lodash.trimend
• lodash.sortedindexby
• lodash.zipobjectdeep
• lodash.unset
• lodash.omit
• lodash.template

v4.17.23

Compare Source

v4.17.22

Compare Source

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