{
  "cveId": "CVE-2026-115683",
  "url": "https://patchblox.com/security/cve/CVE-2026-115683",
  "summary": "CVE-2026-115683 is fixed in epiphany-browser on 1 platform by DEBIAN-CVE-2026-115683 (version 51.2-1), released November 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "epiphany-browser: A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page",
  "description": "A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page.  Epiphany registers the main-world script message handler \u0022tlsErrorPage\u0022 so its internal TLS error page can implement \u0022Accept Risk and Proceed\u0022. The handler was registered immediately before loading the error page, leaving a brief window where the previously loaded untrusted origin could still call window.webkit.messageHandlers.tlsErrorPage.postMessage(...). The only authorization check compares a numeric WebKit page id that increments predictably; an attacker can burst-guess ids and approve a certificate exception with no user click.  If a victim visits malicious site A that redirects to site B with an invalid certificate, site A can, for a few milliseconds, disable TLS certificate error warnings for host B until Epiphany is restarted, enabling man-in-the-middle or site spoofing for that host.  Upstream report: https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2978 Proof of concept: https://beford.net/poc/ssl_poc.html Fix: https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/2245 (register handlers on LOAD_COMMITTED). No fixed release tagged yet; reporter and maintainer describe all current versions as affected. Maintainer notes the risky registration timing dates to commit 1da1caed (Epiphany 45.x era); before that the handlers were always registered and similarly reachable from web content.",
  "published": "2026-10-30T14:16:39Z",
  "severity": "medium",
  "cvss": 6.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
  "epss": 0.0022,
  "epssPercentile": 0.12655,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "epiphany-browser",
      "release": "Debian 14",
      "fixedVersion": "51.2-1",
      "fix": "DEBIAN-CVE-2026-115683",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-115683",
      "released": "2026-11-04T19:14:43Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}