CVE-2021-23434
Prototype Pollution
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
CVE-2021-23434- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
EUVDEUVD-2021-2112
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
EUVD-2021-2112- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v39p-96qg-c8rf
Prototype Pollution in object-path
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === '__proto__' returns false if currentPath is ['__proto__']. This is because the === operator returns always false when the type of the operands is different.
- Record
GHSA-v39p-96qg-c8rf- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-843, CWE-1321
- Updated
- 2026-11-02
NVD
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
CVE-2021-23434- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-843
- Updated
- 2026-11-02
OSV
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
CVE-2021-23434- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-23434
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
DEBIAN-CVE-2021-23434- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
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OSVGHSA-v39p-96qg-c8rf
Prototype Pollution in object-path
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === '__proto__' returns false if currentPath is ['__proto__']. This is because the === operator returns always false when the type of the operands is different.
- Record
GHSA-v39p-96qg-c8rf- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-1321, CWE-843
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-23434
This affects the package object-path before 0.11.6. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
- Record
UBUNTU-CVE-2021-23434- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1774830277 No score
TuxCare security update for object-path (3 CVEs)
TuxCare rebuilt object-path to address 3 CVEs. Fixed in 0.11.4-tuxcare.1.
- Record
CLSA-2026-1774830277- Updated
- 2026-11-02
OSVUSN-5967-1 No score
node-object-path vulnerabilities
It was discovered that the set() method in object-path could be corrupted as a result of prototype pollution by sending a message to the parent process. An attacker could use this issue to cause object-path to crash. (CVE-2020-15256, CVE-2021-23434, CVE-2021-3805)
- Record
USN-5967-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
object-pathnpm |
before 0.11.6 | 0.11.6 |
object-pathTuxCare:npm From an advisory covering 3 CVEs |
0.11.4-tuxcare.0 up to 0.11.4-tuxcare.1, plus listed versions 0.11.4 |
0.11.4-tuxcare.1 |
node-object-pathDebian:12 |
before 0.11.7-1 | 0.11.7-1 |
node-object-pathDebian:13 |
before 0.11.7-1 | 0.11.7-1 |
node-object-pathDebian:14 |
before 0.11.7-1 | 0.11.7-1 |
node-object-pathDebian:10 From an advisory covering 2 CVEs |
before 0.11.4-2+deb10u2, plus listed versions 0.11.4-20.11.4-2+deb10u1 |
0.11.4-2+deb10u2 |
node-object-pathUbuntu:18.04:LTS |
before 0.11.3-1ubuntu0.1, plus listed versions 0.11.3-1 |
0.11.3-1ubuntu0.1 |
node-object-pathUbuntu:20.04:LTS |
before 0.11.4-2ubuntu0.1, plus listed versions 0.11.4-2 |
0.11.4-2ubuntu0.1 |
node-object-pathUbuntu:24.04:LTS |
All versions, plus listed versions 0.11.8+~0.11.1-2 |
None known |
node-object-pathUbuntu:25.10 |
All versions, plus listed versions 0.11.8+~0.11.1-2 |
None known |
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| Package | Affected | Fixed |
|---|---|---|
node-object-pathUbuntu:26.10 |
All versions, plus listed versions 0.11.8+~0.11.4-1 |
None known |
node-object-pathUbuntu:26.04:LTS |
All versions, plus listed versions 0.11.8+~0.11.1-20.11.8+~0.11.4-1 |
None known |
node-object-pathUbuntu:18.04:LTS From an advisory covering 3 CVEs |
before 0.11.3-1ubuntu0.1, plus listed versions 0.11.3-1 |
0.11.3-1ubuntu0.1 |
node-object-pathUbuntu:20.04:LTS From an advisory covering 3 CVEs |
before 0.11.4-2ubuntu0.1, plus listed versions 0.11.4-2 |
0.11.4-2ubuntu0.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23434 is a medium vulnerability (CVSS 5.6) in Mariocasciaro Object-path, published August 27, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.90%, the 79th percentile. Fixed in object-path 0.11.6.
References
snyk.io/vuln/SNYK-JS-OBJECTPATH-1569453
github.com/mariocasciaro/object-path/commit/7bdf4abefd102d16c163d633e8994ef154cab9eb
lists.debian.org/debian-lts-announce/2023/01/msg00031.html
nvd.nist.gov/vuln/detail/CVE-2021-23434
Show 8 moreShow less
security-tracker.debian.org/tracker/CVE-2021-23434
ubuntu.com/security/CVE-2021-23434
cve.org/CVERecord?id=CVE-2021-23434