Resource exhaustion in Handlebarsjs Handlebars
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.037 (89.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.038 · newest: 0.037 · change: -0.001
Affected products
Weakness classification (CWE)
References
- www.npmjs.com/advisories/1300 (Third Party Advisory)
- snyk.io/vuln/SNYK-JS-HANDLEBARS-480388 (Third Party Advisory)
- github.com/handlebars-lang/handlebars.js/commit/8d5530ee2c3ea9f0aee3fde310b9f36… (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-20922?
- CVE-2019-20922 is a high-severity vulnerability in Handlebarsjs Handlebars, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-09-30.
- How severe is CVE-2019-20922?
- High severity. CVSS v3 base score is 7.5 out of 10.