VDB
CVE-2026-86411
CVE-2026-86411
PUBLISHED
Reported by curl · Published October 20, 2026
An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP control connection that a previous easy handle upgraded with `STARTTLS` and authenticated using a client certificate. The second handle performs neither a new TLS handshake nor a new FTP login, so the server continues to authorize it under the first handle's certificate identity.
EPSS 0.43% · 37.6th percentile
Risk Scores
EPSS Score
0.43%
37.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| curl | curl | 8.21.0 |
| alpine | curl | 0 |
| curl | curl | 8.21.0 |
Timeline
- CVE Published
- Oct 14, 2026 PoC Published
- Oct 21, 2026 EPSS Score
- Oct 22, 2026 PoC Published
- Oct 25, 2026 EPSS Score
- Oct 27, 2026 EPSS Score
- Oct 30, 2026 EPSS Score