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CVE-2026-6276

🗓️ 13 May 2026 08:28:19Reported by curlType 
cve
 cve
🔗 web.nvd.nist.gov👁 15 Views

Stale Host header leaks cookies on second request when reusing a curl easy handle without Host.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-6276
13 May 202608:28
attackerkb
AlpineLinux
CVE-2026-6276
13 May 202608:28
alpinelinux
CBLMariner
CVE-2026-6276 affecting package curl for versions less than 8.11.1-7
5 Jun 202612:59
cbl_mariner
Circl
CVE-2026-6276
29 Apr 202607:00
circl
CNNVD
libcurl 安全漏洞
13 May 202600:00
cnnvd
Cvelist
CVE-2026-6276 stale custom cookie host causes cookie leak
13 May 202608:28
cvelist
Debian CVE
CVE-2026-6276
13 May 202608:28
debiancve
EUVD
EUVD-2026-29928
13 May 202608:28
euvd
Hacker One
curl: CVE-2026-6276: stale custom cookie host causes cookie leak
14 Apr 202605:45
hackerone
Tenable Nessus
libcurl 7.71.0 < 8.20.0 Cookie Leak via Stale Host Header
1 May 202600:00
nessus
Rows per page
NVD
Node
haxxcurlRange7.71.08.20.0
[
  {
    "vendor": "curl",
    "product": "curl",
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        "status": "affected",
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        "versionType": "semver"
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        "version": "8.18.0",
        "status": "affected",
        "lessThanOrEqual": "8.18.0",
        "versionType": "semver"
      },
      {
        "version": "8.17.0",
        "status": "affected",
        "lessThanOrEqual": "8.17.0",
        "versionType": "semver"
      },
      {
        "version": "8.16.0",
        "status": "affected",
        "lessThanOrEqual": "8.16.0",
        "versionType": "semver"
      },
      {
        "version": "8.15.0",
        "status": "affected",
        "lessThanOrEqual": "8.15.0",
        "versionType": "semver"
      },
      {
        "version": "8.14.1",
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      },
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      },
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      },
      {
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      {
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      {
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        "versionType": "semver"
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        "version": "8.7.1",
        "status": "affected",
        "lessThanOrEqual": "8.7.1",
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      },
      {
        "version": "8.7.0",
        "status": "affected",
        "lessThanOrEqual": "8.7.0",
        "versionType": "semver"
      },
      {
        "version": "8.6.0",
        "status": "affected",
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        "versionType": "semver"
      },
      {
        "version": "8.5.0",
        "status": "affected",
        "lessThanOrEqual": "8.5.0",
        "versionType": "semver"
      },
      {
        "version": "8.4.0",
        "status": "affected",
        "lessThanOrEqual": "8.4.0",
        "versionType": "semver"
      },
      {
        "version": "8.3.0",
        "status": "affected",
        "lessThanOrEqual": "8.3.0",
        "versionType": "semver"
      },
      {
        "version": "8.2.1",
        "status": "affected",
        "lessThanOrEqual": "8.2.1",
        "versionType": "semver"
      },
      {
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        "lessThanOrEqual": "8.2.0",
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      },
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        "lessThanOrEqual": "8.1.2",
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      },
      {
        "version": "8.1.1",
        "status": "affected",
        "lessThanOrEqual": "8.1.1",
        "versionType": "semver"
      },
      {
        "version": "8.1.0",
        "status": "affected",
        "lessThanOrEqual": "8.1.0",
        "versionType": "semver"
      },
      {
        "version": "8.0.1",
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        "status": "affected",
        "lessThanOrEqual": "7.88.1",
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      },
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        "version": "7.88.0",
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        "lessThanOrEqual": "7.88.0",
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      },
      {
        "version": "7.87.0",
        "status": "affected",
        "lessThanOrEqual": "7.87.0",
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      },
      {
        "version": "7.86.0",
        "status": "affected",
        "lessThanOrEqual": "7.86.0",
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      },
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        "version": "7.85.0",
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      },
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        "version": "7.84.0",
        "status": "affected",
        "lessThanOrEqual": "7.84.0",
        "versionType": "semver"
      },
      {
        "version": "7.83.1",
        "status": "affected",
        "lessThanOrEqual": "7.83.1",
        "versionType": "semver"
      },
      {
        "version": "7.83.0",
        "status": "affected",
        "lessThanOrEqual": "7.83.0",
        "versionType": "semver"
      },
      {
        "version": "7.82.0",
        "status": "affected",
        "lessThanOrEqual": "7.82.0",
        "versionType": "semver"
      },
      {
        "version": "7.81.0",
        "status": "affected",
        "lessThanOrEqual": "7.81.0",
        "versionType": "semver"
      },
      {
        "version": "7.80.0",
        "status": "affected",
        "lessThanOrEqual": "7.80.0",
        "versionType": "semver"
      },
      {
        "version": "7.79.1",
        "status": "affected",
        "lessThanOrEqual": "7.79.1",
        "versionType": "semver"
      },
      {
        "version": "7.79.0",
        "status": "affected",
        "lessThanOrEqual": "7.79.0",
        "versionType": "semver"
      },
      {
        "version": "7.78.0",
        "status": "affected",
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        "versionType": "semver"
      },
      {
        "version": "7.76.1",
        "status": "affected",
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        "versionType": "semver"
      },
      {
        "version": "7.76.0",
        "status": "affected",
        "lessThanOrEqual": "7.76.0",
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      },
      {
        "version": "7.75.0",
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      },
      {
        "version": "7.72.0",
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      },
      {
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      },
      {
        "version": "7.71.0",
        "status": "affected",
        "lessThanOrEqual": "7.71.0",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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14 May 2026 14:21Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00013
SSVC
15