Regular Expression Vulnerability in Handlebars by Handlebars Lang
CVE-2019-20922

7.5HIGH

Key Information:

Vendor

Handlebarsjs

Status
Handlebars
Vendor
CVE Published:
30 September 2020

What is CVE-2019-20922?

The vulnerability in Handlebars versions prior to 4.4.5 allows attackers to exploit eager matching in the template parser. A crafted template can cause the parser to enter an infinite loop, potentially exhausting system resources and leading to a denial of service. This can significantly impact application availability and performance, making it essential for users to update to the latest version to mitigate this risk.

References

https://www.npmjs.com/advisories/1300
x_refsource_MISC
https://snyk.io/vuln/SNYK-JS-HANDLEBARS-480388
x_refsource_MISC
https://github.com/handlebars-lang/handlebars.js/commit/8...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2019-20922 : Regular Expression Vulnerability in Handlebars by Handlebars Lang