{"id":"CVE-2026-44018","aliases":["GHSA-r3xg-rg9j-67fv","PYSEC-2026-2144"],"title":"Docling: Unsafe Archive Extraction and XML Parsing in METS-GBS Backend","summary":"Docling: Unsafe Archive Extraction and XML Parsing in METS-GBS Backend","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","vendor":"docling","product":"docling","ecosystem":"pip","affected":["docling >= 2.45.0, < 2.91.0"],"patched":["docling 2.91.0"],"published":"2026-06-03","updated":"2026-07-13","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-r3xg-rg9j-67fv","references":[{"url":"https://github.com/docling-project/docling/security/advisories/GHSA-r3xg-rg9j-67fv"},{"url":"https://github.com/docling-project/docling"},{"url":"https://github.com/docling-project/docling/releases/tag/v2.91.0"}],"tags":["osv","pip"],"epss":0.00161,"epssPercentile":0.05719,"ingestedAt":"2026-07-13T18:58:02.404Z","slug":"CVE-2026-44018","body":"## Overview\n\n### Impact\nThe METS-GBS backend's XML parsing and the input document format detection lacked security controls, enabling:\n- XML External Entity (XXE) attacks to read local files or cause denial of service\n- Decompression bombs (zip bombs) to exhaust memory and disk space\n- Unbounded archive extraction consuming system resources\n\nAn attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes.\n\n### Patches\nFixed in version 2.91.0. The fix implements:\n- Secure XML parsing with `resolve_entities=False`, `load_dtd=False`, and `no_network=True`\n- Configurable limits: 300 MB total extraction size, 10 MB per file, 1000 member count\n- Cumulative size tracking across all extractions\n- Early termination when limits are exceeded\n- Secure format detection of METS-GBS tar archives with `_detect_mets_gbs()` method: maximum file size (10 MB per file), maximum member count (1000 members), and exception handling to gracefully fail when limits are exceeded\n\n### Workarounds\nAvoid processing METS-GBS archives from untrusted sources. If necessary, pre-validate archives in an isolated environment with resource limits.\n\n### References\n- Fix release: [v2.91.0](https://github.com/docling-project/docling/releases/tag/v2.91.0)\n\n## Affected packages\n\n- `docling >= 2.45.0, < 2.91.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `docling 2.91.0`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}