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CVE-2019-20922

HIGHCVSS 7.5/10EPSS 3.79%

Last modified

CVE-2019-20922 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. EPSS estimates a 3.79% chance of exploitation in the next 30 days.

Description

Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
3.79%

88.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
HandlebarsjsHandlebars>= 4.0.0, < 4.4.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-20922?
Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.
How severe is CVE-2019-20922?
CVE-2019-20922 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.79% probability of exploitation in the next 30 days.
How do I fix CVE-2019-20922?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20922?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST