CVE-2019-18413: In TypeStack class-validator 0.10.2, validate() input validation can be bypassed because certain internal attr

This week

LOW 3.7REMOTEDOWNGRADE

CVE-2019-18413 is a low-severity flaw (CVSS 3.7) affecting typestack class-validator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In TypeStack class-validator 0.10.2, validate() input validation can be bypassed because certain internal attributes can be overwritten via a conflicting name. Even though there is an optional forbidUnknownValues parameter that can be used to reduce the risk of this bypass, this option is not documented and thus most developers configure input validation in the vulnerable default manner. With this vulnerability, attackers can launch SQL Injection

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-79, CWE-89
Published	2019-10-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: typestack class-validator project

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

Am I affected?

Timeline

2019-10-24 18:15 UTCPublished CVE record published
2026-06-17 02:24 UTCUpdated Record last modified

typestack class-validator project typestack class-validator DOWNGRADE

Affected: 0.10.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.10.2

1. Check installed version

apt-cache policy typestack-class-validator || rpm -q typestack-class-validator || typestack-class-validator --version

2. No fixed release: DOWNGRADE to a release before 0.10.2 (Debian / Ubuntu)

apt-cache madison typestack-class-validator sudo apt install typestack-class-validator=<VERSION_BEFORE_0.10.2> sudo apt-mark hold typestack-class-validator

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

dnf --showduplicates list typestack-class-validator sudo dnf downgrade typestack-class-validator-<VERSION_BEFORE_0.10.2> sudo dnf versionlock add typestack-class-validator

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-2019-18413?

typestack class-validator: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18413 being exploited?

CVE-2019-18413 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-2019-18413 affect?

CVE-2019-18413 affects typestack class-validator. Severity is low (CVSS 3.7). In TypeStack class-validator 0.10.2, validate() input validation can be bypassed because certain internal attributes can be overwritten via a conflicting name. Even though there is an optional forbidUnknownValues parameter that can be used

How urgent is CVE-2019-18413?

Priority 43/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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