CVE-2026-80255
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: curl
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.23 | curl | 8.22.0-r0 |
| Alpine 3.24 | curl | 8.22.0-r0 |
| Debian 13 | curl | no fix |
| Debian 14 | curl | 8.22.0-1 |
| Red Hat hummingbird 1 | curl | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-devel | 0:8.22.0-0.1.hum1 |
| Red Hat hummingbird 1 | libcurl-minimal | 0:8.22.0-0.1.hum1 |
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.29 |
| Ubuntu 24.04 LTS | curl | 8.5.0-2ubuntu10.15 |
| Ubuntu 26.04 LTS | curl | 8.18.0-1ubuntu2.7 |
| Ubuntu 26.10 | curl | 8.20.0-2ubuntu11 |
| Ubuntu Pro 16.04 LTS | curl | 7.47.0-1ubuntu2.19+esm20 |
| Ubuntu Pro 18.04 LTS | curl | 7.58.0-2ubuntu3.24+esm14 |
| Ubuntu Pro 20.04 LTS | curl | 7.68.0-1ubuntu2.25+esm9 |
| openSUSE Tumbleweed | curl | 8.22.0-1.1 |