Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2019-20920
n/a n/a — Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution.
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H N N C H L L 8.1 .0319 87.9 —
AFFECTED
Product Versions Fixed
n/a n/a – —
TIMELINE
Sep 30 Reserved by mitre
Sep 30 Published (CNA: mitre)
Oct 8 ENRICHED — CVE-2019-20920. Received CVSS 8.1 and CPE data from NVD.
Oct 8 EXPLOIT PUBLISHED — CVE-2019-20920. Public exploit reference added.
Description
Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| September 30, 2020 | Reserved | Reserved by mitre |
| September 30, 2020 | Published | Published (CNA: mitre) |
| October 8, 2026 | ENRICHED | ENRICHED — CVE-2019-20920. Received CVSS 8.1 and CPE data from NVD. |
| October 8, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2019-20920. Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| n/a | n/a | — | n/a | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-20920 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
