CVE-2026-80255

HighCVSS 7.5/10Last modified Sep 15, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-201

Affected software

No affected versions have been published.

Timeline

Published: Sep 6, 2026
Last modified: Sep 15, 2026
NVD status: Modified

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