GHSA-xg43-5579-qw6v: adawolfa/isdoc Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xg43-5579-qw6v",
  "modified" : "2026-07-15T23:30:55Z",
  "published" : "2026-07-15T23:30:55Z",
  "aliases" : [ ],
  "summary" : "adawolfa/isdoc: Uncontrolled resource consumption (decompression bomb) when reading untrusted ISDOCX or PDF files",
  "details" : "### Impact\n\n`adawolfa/isdoc` reads ISDOC invoices from ISDOCX (ZIP) archives and from PDF files with embedded ISDOC documents and supplements. Affected versions inflate ZIP entries and read embedded files **without validating their uncompressed size**, so a small crafted file can amplify into gigabytes:\n\n- **ISDOCX decompression bomb** — `getFromName()` inflates the ISDOC document and binary supplements with no size cap.\n- **`saveTo()` disk-fill** — the supplement copy loop writes inflated bytes to disk with no running byte budget, so a bomb can exhaust disk even if the central-directory size is under-reported.\n- **PDF embedded files** — an embedded file whose declared `Length` is enormous is read and digested with no upper bound.\n\nExploitation requires the application to parse an attacker-supplied `.isdocx` or `.pdf` (the typical use is generating files or parsing files from trusted vendors, so a user must be induced to process a malicious file). When that happens the process can be driven to exhaust memory or disk, causing denial of service. There is **no confidentiality or integrity impact** — availability only.\n\n### Patches\n\nFixed in **1.4.3**, **1.5.1**, **1.6.1** and **2.0.0**. The readers now:\n\n- read the uncompressed size from the ZIP central directory (`statName()`) and reject entries over a cap **before inflating** — 256 KB (`DocumentSizeLimit`) for the ISDOC document, 32 MB (`SizeLimit`) for supplements;\n- enforce a running byte budget in `saveTo()` and unlink the partial file on overflow;\n- reject PDF-embedded files whose declared `Length` exceeds 256 MB before reading or digesting them.\n\nNew exceptions `ReaderException::zipEntryTooLarge()`, `SupplementException::supplementTooLarge()` and `ReaderException::pdfSupplementTooLarge()` surface the rejection.\n\n### Unsupported versions\n\nVersions **before 1.4.0** (the 1.0–1.3 lines) are also affected and will **not** receive a fix, because they target end-of-life PHP. Users on those lines should upgrade to a maintained release — 1.4.3, 1.5.1, 1.6.1, or 2.0.0.\n\n### Workarounds\n\nNo code-level workaround exists in affected versions; upgrading is the fix. As mitigation, restrict parsing to trusted input, or enforce an external size / decompression limit (validate ZIP entry sizes, cap process memory) before handing files to the library.\n\n### Resources\n\n- Decompression-bomb fix: commit [`935fb2a`](https://github.com/adawolfa/isdoc/commit/935fb2aa41ceddfcf43174a61a36ec620611a105) (backported, released as 1.4.3 / 1.5.1 / 1.6.1) and [`02a1012`](https://github.com/adawolfa/isdoc/commit/02a10123a3d5fd92950b8e4952959317c0a18952) (master, released as 2.0.0).\n- CWE-409 (Improper Handling of Highly Compressed Data), CWE-400 (Uncontrolled Resource Consumption).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "adawolfa/isdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.6.0"
      }, {
        "fixed" : "1.6.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "adawolfa/isdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.5.0"
      }, {
        "fixed" : "1.5.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "adawolfa/isdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.4.0"
      }, {
        "fixed" : "1.4.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "adawolfa/isdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 1.4.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/adawolfa/isdoc/security/advisories/GHSA-xg43-5579-qw6v"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adawolfa/isdoc/commit/02a10123a3d5fd92950b8e4952959317c0a18952"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adawolfa/isdoc/commit/935fb2aa41ceddfcf43174a61a36ec620611a105"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/adawolfa/isdoc"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-409" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-15T23:30:55Z",
    "nvd_published_at" : null
  }
}