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chore(deps): update dependency lodash-es to v4.18.1 [security]#1031

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chore(deps): update dependency lodash-es to v4.18.1 [security]#1031
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renovate/npm-lodash-es-vulnerability

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@renovate renovate bot commented Jan 22, 2026

This PR contains the following updates:

Package Change Age Confidence
lodash-es (source) 4.17.214.18.1 age confidence

GitHub Vulnerability Alerts

CVE-2025-13465

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.

CVE-2026-4800

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.

CVE-2026-2950

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.


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:

v4.17.23

Compare Source

v4.17.22

Compare Source


Configuration

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

Rebasing: Whenever PR becomes conflicted, 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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commit: 98ef2b3

@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch from 4d77288 to d026c5b Compare January 23, 2026 19:00
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch from d026c5b to f3260ce Compare February 2, 2026 20:06
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch 3 times, most recently from 7b18ba7 to bc5e4c2 Compare February 12, 2026 13:50
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch from bc5e4c2 to 1411ff7 Compare March 5, 2026 20:45
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch 3 times, most recently from e9562c0 to a4a534d Compare March 13, 2026 17:53
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch from a4a534d to 3aa3e69 Compare March 23, 2026 14:00
@renovate renovate bot changed the title chore(deps): update dependency lodash-es to v4.17.23 [security] chore(deps): update dependency lodash-es to v4.17.23 [security] - autoclosed Mar 27, 2026
@renovate renovate bot closed this Mar 27, 2026
@renovate renovate bot deleted the renovate/npm-lodash-es-vulnerability branch March 27, 2026 01:47
@renovate renovate bot changed the title chore(deps): update dependency lodash-es to v4.17.23 [security] - autoclosed chore(deps): update dependency lodash-es to v4.17.23 [security] Mar 30, 2026
@renovate renovate bot reopened this Mar 30, 2026
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch 3 times, most recently from ed0467e to fba1178 Compare April 1, 2026 17:24
@renovate renovate bot changed the title chore(deps): update dependency lodash-es to v4.17.23 [security] chore(deps): update dependency lodash-es to v4.18.1 [security] Apr 2, 2026
@renovate renovate bot force-pushed the renovate/npm-lodash-es-vulnerability branch from fba1178 to 98ef2b3 Compare April 2, 2026 05:14
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