CVEvulnerability
CVE-2026-80255
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-09-06
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-201
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.
Affected configurations
• haxx curl (>= 8.13.0 < 8.22.0)
Related
Weakness · CWE (1)
- CWE-201 Insertion of Sensitive Information Into Sent Data weakness
References
- https://curl.se/docs/CVE-2026-80255.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-80255.json Vendor Advisory
- https://hackerone.com/reports/3972395 Exploit, Mitigation, Third Party Advisory
- https://hackerone.com/reports/3972395 Exploit, Mitigation, Third Party Advisory