CVE-2021-23434: This affects the package object-path before 0.11.6

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MEDIUM 5.6REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2021-23434 is a medium-severity flaw (CVSS 5.6) affecting object-path, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-843
Published	2021-08-27
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: debian · object-path project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-08-27 17:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

object-path project object-path UPGRADE

Affected: < 0.11.6

Fixed in: 0.11.6

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls object-path

2. UPGRADE to 0.11.6

npm install object-path@">=0.11.6"

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-23434?

object-path: upgrade to 0.11.6; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-23434 being exploited?

CVE-2021-23434 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-23434 affect?

CVE-2021-23434 affects object-path, debian linux. Severity is medium (CVSS 5.6). 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_

How urgent is CVE-2021-23434?

Priority 55/100. Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2021-3805 HIGH 7.5 UPGRADE MITIGATE object-path is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pol
CVE-2020-15256 HIGH 7.7 UPGRADE A prototype pollution vulnerability has been found in `object-path` <= 0.11.4 affecting the `set()` method

References

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