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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-80255

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 50.6%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-80255
  • Haxx » Curl » Version: 8.13.0
    cpe:2.3:a:haxx:curl:8.13.0
  • Haxx » Curl » Version: 8.14.0
    cpe:2.3:a:haxx:curl:8.14.0
  • Haxx » Curl » Version: 8.14.1
    cpe:2.3:a:haxx:curl:8.14.1
  • Haxx » Curl » Version: 8.15.0
    cpe:2.3:a:haxx:curl:8.15.0
  • Haxx » Curl » Version: 8.16.0
    cpe:2.3:a:haxx:curl:8.16.0
  • Haxx » Curl » Version: 8.17.0
    cpe:2.3:a:haxx:curl:8.17.0
  • Haxx » Curl » Version: 8.18.0
    cpe:2.3:a:haxx:curl:8.18.0
  • Haxx » Curl » Version: 8.19.0
    cpe:2.3:a:haxx:curl:8.19.0
  • Haxx » Curl » Version: 8.20.0
    cpe:2.3:a:haxx:curl:8.20.0
  • Haxx » Curl » Version: 8.21.0
    cpe:2.3:a:haxx:curl:8.21.0


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