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CVE-2020-15256

Prototype pollution in object-path

7.7 HighFix available

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

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
High
Availability
High

Exploit likelihood

1.55%Down 1.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.7

Prototype pollution in object-path

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
CVE-2020-15256
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-471, CWE-20
Updated
2026-11-02
EUVDEUVD-2020-1425 7.7

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
EUVD-2020-1425
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-cwx2-736x-mf6w 7.7

Prototype pollution in object-path

Impact

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable.

Patches

Upgrade to version >= 0.11.5

Workarounds

Don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

References

Read more about the prototype pollution vulnerability

For more information

If you have any questions or comments about this advisory:

Record
GHSA-cwx2-736x-mf6w
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-20, CWE-471
Updated
2026-11-02
NVD 7.7

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
CVE-2020-15256
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-20, CWE-471
Updated
2026-11-02
OSV 9.8

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
CVE-2020-15256
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-15256 9.8

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
DEBIAN-CVE-2020-15256
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVGHSA-cwx2-736x-mf6w 7.7

Prototype pollution in object-path

Impact

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable.

Patches

Upgrade to version >= 0.11.5

Workarounds

Don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

References

Read more about the prototype pollution vulnerability

For more information

If you have any questions or comments about this advisory:

Record
GHSA-cwx2-736x-mf6w
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-20, CWE-471
Updated
2026-11-02
OSVUBUNTU-CVE-2020-15256 9.8

A prototype pollution vulnerability has been found in object-path <= 0.11.4 affecting the set() method. The vulnerability is limited to the includeInheritedProps mode (if version >= 0.11.0 is used), which has to be explicitly enabled by creating a new instance of object-path and setting the option includeInheritedProps: true, or by using the default withInheritedProps instance. The default operating mode is not affected by the vulnerability if version >= 0.11.0 is used. Any usage of set() in versions < 0.11.0 is vulnerable. The issue is fixed in object-path version 0.11.5 As a workaround, don't use the includeInheritedProps: true options or the withInheritedProps instance if using a version >= 0.11.0.

Record
UBUNTU-CVE-2020-15256
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/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

Affected packages
PackageAffectedFixed
object-path
npm
 before 0.11.5
0.11.5
object-path
TuxCare: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-path
Debian:12
 before 0.11.5-3
0.11.5-3
node-object-path
Debian:13
 before 0.11.5-3
0.11.5-3
node-object-path
Debian:14
 before 0.11.5-3
0.11.5-3
node-object-path
Ubuntu:18.04:LTS
 before 0.11.3-1ubuntu0.1, plus listed versions
0.11.3-1
0.11.3-1ubuntu0.1
node-object-path
Ubuntu:20.04:LTS
 before 0.11.4-2ubuntu0.1, plus listed versions
0.11.4-2
0.11.4-2ubuntu0.1
node-object-path
Ubuntu: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-path
Ubuntu: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

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-15256 is a high vulnerability (CVSS 7.7) in Mariocasciaro Object-path, published October 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.55%, the 75th percentile. Fixed in object-path 0.11.5.

References

Show 5 moreShow less
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