lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit`
The _.unset and _.omit functions in Lodash are vulnerable to prototype pollution. 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. The issue is patched from 4.18.0 to 4.18.1 depending on the package: lodash, lodash-es, and lodash-amd in 4.18.1, and the standalone lodash.unset and lodash.omit packages in 4.18.0.
CVE-2026-2950
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-2950
lodash
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lodash-es
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lodash-amd
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lodash.unset
Source reference: /containers/cna/affected/3/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lodash.omit
Source reference: /containers/cna/affected/4/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "lodash",
"product": "lodash",
"versions": [
{
"status": "affected",
"version": "4.17.23",
"lessThan": "4.18.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.1",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/lodash",
"defaultStatus": "unaffected"
},
{
"vendor": "lodash",
"product": "lodash-es",
"versions": [
{
"status": "affected",
"version": "4.17.23",
"lessThan": "4.18.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.1",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/lodash-es",
"defaultStatus": "unaffected"
},
{
"vendor": "lodash",
"product": "lodash-amd",
"versions": [
{
"status": "affected",
"version": "4.17.23",
"lessThan": "4.18.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.1",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/lodash-amd",
"defaultStatus": "unaffected"
},
{
"vendor": "lodash",
"product": "lodash.unset",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.18.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/lodash.unset",
"defaultStatus": "unaffected"
},
{
"vendor": "lodash",
"product": "lodash.omit",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.18.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/lodash.omit",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-2950
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #28589 · Revision 1
- Added to Heist Feed
- Publisher date