---
cve: "CVE-2026-80255"
severity: "LOW"
cvss: 3.1
epss: "2.9%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-09-06 18:17:22"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T00:35:30+02:00"
---

# CVE-2026-80255

> 3.1 LOW

## Beschreibung

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.

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80255) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_