CVE-2026-80255

Public on 2026-09-04

Modified on 2026-09-04

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.

Severity

Low

See what this means

CVSS v3 Base Score

3.7

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	curl	Not Affected
Amazon Linux 2023	curl	Pending Fix
Amazon Linux 2027 Preview	curl	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	3.7	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-80255 Mitre: CVE-2026-80255