VDB
CVE-2026-80255
CVE-2026-80255
PUBLISHED
CVSS 7.5 HIGH
Reported by curl · Published September 6, 2026
A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of space (ascii code 32) immediately before the `Secure` attribute causes curl to store the cookie without its Secure flag. The cookie might then wrongfully be sent over plaintext HTTP on subsequent requests to the same host.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| curl | curl | 8.13.0, 8.15.0, 8.17.0 |
| curl | curl | 1aea05a6c2699e80c75936d58569851555acd603 |
| curl | curl | 8.21.0, 8.20.0, 8.19.0 |
| alpine | curl | 0, 0, 0 |
| curl | curl | 8.14.0, 8.13.0, 8.13.0 |
| curl | curl |
Timeline
- CVE Published
- Sep 3, 2026 PoC Published
- Sep 7, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 18, 2026 EPSS Score