CVE-2019-10746: mixin-deep is vulnerable to Prototype Pollution in versions before 1.3.2 and version 2.0.0

This week

CRITICAL 9.8REMOTEUPGRADEMITIGATEDOWNGRADE

CVE-2019-10746 is a critical-severity flaw (CVSS 9.8) affecting mixin-deep, fedora, communications cloud native core network function cloud native environment. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

mixin-deep is vulnerable to Prototype Pollution in versions before 1.3.2 and version 2.0.0. The function mixin-deep could be tricked into adding or modifying properties of Object.prototype using a constructor payload.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-88
Published	2019-08-23
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: fedoraproject · mixin-deep project · oracle

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

Am I affected?

Timeline

2019-08-23 17:15 UTCPublished CVE record published
2026-06-17 02:11 UTCUpdated Record last modified

mixin-deep project mixin-deep UPGRADE

Affected: < 1.3.2 · 2.0.0

Fixed in: 1.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls mixin-deep

2. UPGRADE to 1.3.2

npm install mixin-deep@">=1.3.2"

fedoraproject fedora MITIGATE

Affected: 30 · 31

Fixed in: no fixed release known

Safe to downgrade to: a release before 30

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.

oracle communications cloud native core network function cloud native environment DOWNGRADE

Affected: 1.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-network-function-cloud-native-environment sudo apt install communications-cloud-native-core-network-function-cloud-native-environment=<VERSION_BEFORE_1.4.0> sudo apt-mark hold communications-cloud-native-core-network-function-cloud-native-environment

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

dnf --showduplicates list communications-cloud-native-core-network-function-cloud-native-environment sudo dnf downgrade communications-cloud-native-core-network-function-cloud-native-environment-<VERSION_BEFORE_1.4.0> sudo dnf versionlock add communications-cloud-native-core-network-function-cloud-native-environment

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-2019-10746?

mixin-deep: upgrade to 1.3.2; fedora: mitigate or apply the listed mitigation; communications cloud native core network function cloud native environment: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-10746 being exploited?

CVE-2019-10746 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-2019-10746 affect?

CVE-2019-10746 affects mixin-deep, fedora, communications cloud native core network function cloud native environment. Severity is critical (CVSS 9.8). mixin-deep is vulnerable to Prototype Pollution in versions before 1.3.2 and version 2.0.0. The function mixin-deep could be tricked into adding or modifying properties of Object.prototype using a constructor payload.

How urgent is CVE-2019-10746?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2018-3719 HIGH 8.8 UPGRADE mixin-deep node module before 1.3.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability

References

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