lodash-4.17.23.tgz: 2 vulnerabilities (highest severity is: 8.1)

[mend-for-github-com]

Vulnerable Library - lodash-4.17.23.tgz

Lodash modular utilities.

Library home page: https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Found in HEAD commit: a7f0948738582b190c10062a408e10b28b6ec75d

Vulnerabilities

Vulnerability	Severity	CVSS	Exploit Maturity	EPSS	Dependency	Type	Fixed in (lodash version)	Remediation Possible**	Reachability
CVE-2026-4800	High	8.1	Not Defined	0.1%	lodash-4.17.23.tgz	Direct	lodash-amd - 4.18.0,lodash - 4.18.0,lodash.template - 4.18.0,lodash-es - 4.18.0	❌
CVE-2026-2950	Medium	6.5	Not Defined	0.0%	lodash-4.17.23.tgz	Direct	lodash-es - 4.17.23,lodash-amd - 4.17.23,lodash - 4.17.23	✅

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

Details

CVE-2026-4800

Vulnerable Library - lodash-4.17.23.tgz

Lodash modular utilities.

Library home page: https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ lodash-4.17.23.tgz (Vulnerable Library)

Found in HEAD commit: a7f0948738582b190c10062a408e10b28b6ec75d

Found in base branch: main

Vulnerability Details

Impact:
The fix for CVE-2021-23337 (GHSA-35jh-r3h4-6jhm) 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.
Workarounds:
Do not pass untrusted input as key names in options.imports. Only use developer-controlled, static key names.

Publish Date: 2026-03-31

URL: CVE-2026-4800

Threat Assessment

Exploit Maturity: Not Defined

EPSS: 0.1%

CVSS 3 Score Details (8.1)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-r5fr-rjxr-66jc

Release Date: 2026-03-31

Fix Resolution: lodash-amd - 4.18.0,lodash - 4.18.0,lodash.template - 4.18.0,lodash-es - 4.18.0

CVE-2026-2950

Vulnerable Library - lodash-4.17.23.tgz

Lodash modular utilities.

Library home page: https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ lodash-4.17.23.tgz (Vulnerable Library)

Found in HEAD commit: a7f0948738582b190c10062a408e10b28b6ec75d

Found in base branch: main

Vulnerability 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: GHSA-xxjr-mmjv-4gpg) 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.

Publish Date: 2026-03-31

URL: CVE-2026-2950

Threat Assessment

Exploit Maturity: Not Defined

EPSS: 0.0%

CVSS 3 Score Details (6.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-xxjr-mmjv-4gpg

Release Date: 2026-03-31

Fix Resolution: lodash-es - 4.17.23,lodash-amd - 4.17.23,lodash - 4.17.23

In order to enable automatic remediation, please create workflow rules

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