{
  "threat_severity" : "Important",
  "public_date" : "2026-07-03T06:14:17Z",
  "bugzilla" : {
    "description" : "curl: curl: Insecure connection establishment due to TLS configuration mismatch",
    "id" : "2496763",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2496763"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-295",
  "details" : [ "A vulnerability exists where a new transfer that uses STARTTLS to upgrade the\nconnection might reuse an existing live connection even though the TLS\nconfiguration mismatches so it should not.", "A flaw was found in curl. When a new data transfer attempts to upgrade its connection using STARTTLS, it may incorrectly reuse an existing live connection. This reuse can occur even if the Transport Layer Security (TLS) configuration of the new transfer does not match the existing connection, potentially leading to an insecure connection being established." ],
  "statement" : "This is an Important flaw as `curl` may establish an insecure connection when attempting to upgrade a transfer with STARTTLS, potentially reusing an existing connection with mismatched TLS configurations. This could lead to unexpected data exposure or compromise, particularly in environments where `curl` is used for sensitive data transfers and relies on STARTTLS for security.",
  "affected_release" : [ {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-06-24T00:00:00Z",
    "advisory" : "RHSA-2026:29017",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "curl-main-8.21.0-0.1.hum1",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-07-02T00:00:00Z",
    "advisory" : "RHSA-2026:34975",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "rust-main-1.96.1-1.hum1",
    "impact" : "important"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Affected",
    "package_name" : "rhcos",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Dev Spaces",
    "fix_state" : "Affected",
    "package_name" : "devspaces/code-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_devspaces:3"
  }, {
    "product_name" : "Red Hat Trusted Profile Analyzer",
    "fix_state" : "Affected",
    "package_name" : "rhtpa/rhtpa-trustification-service-rhel9",
    "cpe" : "cpe:/a:redhat:trusted_profile_analyzer:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-8286\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-8286\nhttps://curl.se/docs/CVE-2026-8286.html\nhttps://curl.se/docs/CVE-2026-8286.json\nhttps://hackerone.com/reports/3718195" ],
  "name" : "CVE-2026-8286",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}