{
  "cveId": "CVE-2026-40930",
  "url": "https://patchblox.com/security/cve/CVE-2026-40930",
  "summary": "CVE-2026-40930 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-40930, released May 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body",
  "description": "LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to \u0060png_process_data\u0060. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.",
  "published": "2026-06-04T09:16:00Z",
  "severity": "Moderate",
  "cvss": 5.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
  "cwe": "Interpretation Conflict",
  "epss": 0.00202,
  "epssPercentile": 0.10274,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40930",
  "fixes": [
    {
      "platform": "linux",
      "product": "firefox",
      "release": "amzn 2023",
      "fixedVersion": "140.11.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1793",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1793",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "140.11.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1793",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1793",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "140.11.0-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-1793",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1793",
      "released": "2026-06-08T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libpng-tools",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.37-2ubuntu0.1~esm3",
      "fix": "libpng-tools 1.6.37-2ubuntu0.1~esm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libpng-tools-1.6.37-2ubuntu0.1-esm3",
      "released": "2026-06-04T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libpng-tools",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.6.37-3ubuntu0.6",
      "fix": "libpng-tools 1.6.37-3ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpng-tools-1.6.37-3ubuntu0.6",
      "released": "2026-06-04T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libpng1.6",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.6.37-4",
      "fix": "DEBIAN-CVE-2026-40930",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40930",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "libpng1.6",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.6.37-4",
      "fix": "DEBIAN-CVE-2026-40930",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40930",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "libpng1.6",
      "release": "Debian 14",
      "fixedVersion": "1.6.37-4",
      "fix": "DEBIAN-CVE-2026-40930",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-40930",
      "released": "2026-05-27T17:38:13Z"
    },
    {
      "platform": "linux",
      "product": "libpng16-16",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.6.37-2ubuntu0.1~esm3",
      "fix": "libpng16-16 1.6.37-2ubuntu0.1~esm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libpng16-16-1.6.37-2ubuntu0.1-esm3",
      "released": "2026-06-04T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libpng16-16",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.6.37-3ubuntu0.6",
      "fix": "libpng16-16 1.6.37-3ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpng16-16-1.6.37-3ubuntu0.6",
      "released": "2026-06-04T09:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}