CVE-2026-80255

UNKNOWN

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.

Timeline

Published:September 6th, 2026 6:17 PM

Last modified:September 6th, 2026 6:17 PM

CVSS Scoring

No CVSS v3 score available

References & Reports

Advisories, patches, and third-party reports

https://curl.se/docs/CVE-2026-80255.html
https://curl.se/docs/CVE-2026-80255.json
https://hackerone.com/reports/3972395

Source: NIST NVD · Data may lag official sources by up to one minute