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.
twentyhq twenty — Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L R C H H N 8.7 .0026 17.7 —
AFFECTED
Product Versions Fixed
twenty <= 1.18.0 – —
TIMELINE
May 7 Reserved by GitHub_M
May 26 EXPLOIT PUBLISHED — CVE-2026-44729 (twentyhq twenty). Public exploit reference added.
May 26 Published (CNA: GitHub_M)
Description
Twenty is an open source CRM. In 1.18.0 and earlier, the file serving endpoints in Twenty CRM at /files/* and /file/:fileFolder/:id serve uploaded files using fileStream.pipe(res) without setting any Content-Type, Content-Disposition, or X-Content-Type-Options response headers. This allows an authenticated attacker to upload an HTML file containing JavaScript, which will be rendered by the victim's browser in the context of the Twenty CRM domain when accessed — enabling session hijacking, account takeover, and data theft.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 7, 2026 | Reserved | Reserved by GitHub_M |
| May 26, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-44729 (twentyhq twenty). Public exploit reference added. |
| May 26, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| twentyhq | twenty | — | <= 1.18.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-44729 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.