{
  "cveId": "CVE-2026-108082",
  "url": "https://patchblox.com/security/cve/CVE-2026-108082",
  "summary": "CVE-2026-108082 is fixed in symfony on 1 platform, first by DEBIAN-CVE-2026-108082, released October 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "symfony: Symfony is a PHP framework for web and console applications and a set of reusable PHP components",
  "description": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to versions\u00A05.4.54,\u00A06.4.46,\u00A07.4.19, and\u00A08.1.7,\u00A0HeaderUtils::split() parsed header values with a pattern whose token alternative also matched whitespace, followed by a (?\u003C!\\s) lookbehind. A run of whitespace placed before a separator could be divided among the iterations of the enclosing repetition in exponentially many ways, and the engine tried all of them before settling. HeaderBag calls it for the Cache-Control header whenever a Request is built, so any application handling HTTP requests is reachable, with no authentication.    A single request carrying such a header costs close to a second of CPU (813 ms for a run of 17 spaces in an 8 KB header on PHP 8.5, doubling with each extra space). From 18 spaces on, preg_match_all() gives up at pcre.backtrack_limit and split() returns an empty array, so every directive of the header is silently dropped.    This issue affects symfony/http-foundation\u00A0v4.1.0-BETA1 through v5.4.53, v6.0.0-BETA1 through\u00A0v6.4.45, v7.0.0-BETA1 through\u00A0v7.4.18, and v8.0.0-BETA1 through\u00A0v8.1.6.",
  "published": "2026-10-15T15:17:22Z",
  "severity": "",
  "epss": 0.0048,
  "epssPercentile": 0.41722,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "symfony",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.4.49\u002Bdfsg-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-108082",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-108082",
      "released": "2026-10-17T16:04:57Z"
    },
    {
      "platform": "linux",
      "product": "symfony",
      "release": "Debian 14",
      "fixedVersion": "7.4.19\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-108082",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-108082",
      "released": "2026-10-17T16:04:57Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}