CVE-2026-93561

{
  "etk_id": "ETK-2026-2446",
  "cve_id": "CVE-2026-93561",
  "display_id": "CVE-2026-93561",
  "ghsa_id": "GHSA-7p33-hhxj-4qcr",
  "euvd_id": "EUVD-2026-82864",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Response smuggling in Netty Memcache codec",
  "summary": "Netty's `io.netty:netty-codec-memcache` can parse certain Memcache binary response length fields incorrectly, causing subsequent response data to be associated with the wrong frame. A malicious Memcache server may exploit this to expose one client's response data to another in applications using shared proxy or cache connections; receiving responses from such a server is the relevant precondition.",
  "mitigation": "Upgrade `io.netty:netty-codec-memcache` to 4.2.18.Final or 4.1.138.Final, as applicable. Until upgraded, restrict Memcache backend connections to trusted servers and isolate client response streams where possible.",
  "vendor": "maven",
  "product": "maven:io.netty:netty-codec-memcache",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.2.0.Final, <= 4.2.17.Final"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "4.2.18.Final"
      ],
      "package_name": "io.netty:netty-codec-memcache",
      "purl": "pkg:maven/io.netty/netty-codec-memcache"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=4.1.137.Final"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "4.1.138.Final"
      ],
      "package_name": "io.netty:netty-codec-memcache",
      "purl": "pkg:maven/io.netty/netty-codec-memcache"
    }
  ],
  "cwes": [
    195
  ],
  "cvss_score": 6.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 11.9663214,
  "t0_at": "2026-09-18T10:02:36.581000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-18T10:02:36.581000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-18T10:02:36.581000+00:00",
      "url": "https://github.com/netty/netty/security/advisories/GHSA-wxrh-4rgq-pjcg"
    }
  }
}