Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U H H H 9.8 .0050 41.1 —
AFFECTED Product Versions Fixed velocity.js <= 2.1.5 – —
TIMELINE May 8 Reserved by GitHub_M May 26 EXPLOIT PUBLISHED — CVE-2026-44966 (shepherdwind velocity.js). Public exploit reference added. May 26 Published (CNA: GitHub_M)
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Velocity templates. If an application renders a template controlled by an attacker, it is possible to modify Object.prototype, potentially leading to Denial of Service (DoS) or Remote Code Execution (RCE) depending on the server environment.
| Date | Event | Detail |
|---|---|---|
| May 8, 2026 | Reserved | Reserved by GitHub_M |
| May 26, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-44966 (shepherdwind velocity.js). Public exploit reference added. |
| May 26, 2026 | Published | Published (CNA: GitHub_M) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| shepherdwind | velocity.js | — | <= 2.1.5 | — |
Authoritative record: CVE-2026-44966 at cve.org
Vendors: shepherdwind
Weaknesses: CWE-1321
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-44966 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 Wednesday, August 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.