{
  "cveId": "CVE-2026-43970",
  "url": "https://patchblox.com/security/cve/CVE-2026-43970",
  "summary": "CVE-2026-43970 is fixed in erlang-cowlib on 1 platform by DEBIAN-CVE-2026-43970 (version 2.17.1-1), released May 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Decompression Bomb in cow_spdy:inflate/2 Allows Memory Exhaustion via Crafted SPDY Frame",
  "description": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion.  cow_spdy:inflate/2 in cowlib passes peer-supplied compressed bytes directly to zlib:inflate/2 with no output size bound. The SPDY header compression dictionary (?ZDICT) is public, and zlib compresses long runs of repeated bytes at roughly 1024:1, so a few kilobytes of SPDY frame payload can decompress to gigabytes on the BEAM heap, OOM-killing the node. A single unauthenticated SPDY frame is sufficient to trigger the condition. The parsers for syn_stream, syn_reply, and headers frame types are all affected via cow_spdy:parse_headers/2.  This issue affects cowlib from 0.1.0 before 2.16.1.",
  "published": "2026-05-13T19:17:25Z",
  "severity": "Moderate",
  "cwe": "Improper Handling of Highly Compressed Data (Data Amplification)",
  "epss": 0.00511,
  "epssPercentile": 0.43813,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43970",
  "fixes": [
    {
      "platform": "linux",
      "product": "erlang-cowlib",
      "release": "Debian 14",
      "fixedVersion": "2.17.1-1",
      "fix": "DEBIAN-CVE-2026-43970",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43970",
      "released": "2026-05-13T19:17:25Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}