CVE-2020-35149
Code Injection in mquery
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
CVE-2020-35149- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Updated
- 2026-11-02
CVE List No score
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
CVE-2020-35149- Updated
- 2026-11-02
EUVDEUVD-2020-1478 No score
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
EUVD-2020-1478- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-45q2-34rf-mr94
Code Injection in mquery
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
GHSA-45q2-34rf-mr94- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-94
- Updated
- 2026-11-02
OSV
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
CVE-2020-35149- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-45q2-34rf-mr94
Code Injection in mquery
lib/utils.js in mquery before 3.2.3 allows a pollution attack because a special property (e.g., proto) can be copied during a merge or clone operation.
- Record
GHSA-45q2-34rf-mr94- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-94
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mquerynpm |
before 3.2.3 | 3.2.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-35149 is a medium vulnerability (CVSS 5.3) in Mquery Project Mquery, published December 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.04%, the 64th percentile. Fixed in mquery 3.2.3.