CVE-2021-23440: This affects the package set-value before <2.0.1, >=3.0.0 <4.0.1

Q: How urgent is CVE-2021-23440?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.3REMOTEUPGRADEDOWNGRADE

CVE-2021-23440 is a high-severity flaw (CVSS 7.3) affecting set-value, communications cloud native core policy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package set-value before <2.0.1, >=3.0.0 <4.0.1. A type confusion vulnerability can lead to a bypass of CVE-2019-10747 when the user-provided keys used in the path parameter are arrays.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-843
Published	2021-09-12
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: oracle · set-value project

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

Am I affected?

Timeline

2021-09-12 13:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

set-value project set-value UPGRADE

Affected: < 2.0.1 · >= 3.0.0 and < 4.0.1

Fixed in: 2.0.1, 4.0.1

Safe to downgrade to: a release before 3.0.0

1. Check installed version

npm ls set-value

2. UPGRADE to 2.0.1

npm install set-value@">=2.0.1"

3. If no update is available yet, DOWNGRADE to a release before 3.0.0

npm view set-value versions npm install set-value@"<3.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

oracle communications cloud native core policy DOWNGRADE

Affected: 1.14.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.14.0

1. Check installed version

apt-cache policy communications-cloud-native-core-policy || rpm -q communications-cloud-native-core-policy || communications-cloud-native-core-policy --version

2. No fixed release: DOWNGRADE to a release before 1.14.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-policy sudo apt install communications-cloud-native-core-policy=<VERSION_BEFORE_1.14.0> sudo apt-mark hold communications-cloud-native-core-policy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list communications-cloud-native-core-policy sudo dnf downgrade communications-cloud-native-core-policy-<VERSION_BEFORE_1.14.0> sudo dnf versionlock add communications-cloud-native-core-policy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-23440?

set-value: upgrade to 2.0.1, 4.0.1; communications cloud native core policy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-23440 being exploited?

CVE-2021-23440 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-2021-23440 affect?

CVE-2021-23440 affects set-value, communications cloud native core policy. Severity is high (CVSS 7.3). This affects the package set-value before <2.0.1, >=3.0.0 <4.0.1. A type confusion vulnerability can lead to a bypass of CVE-2019-10747 when the user-provided keys used in the path parameter are arrays.

How urgent is CVE-2021-23440?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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