{"id":"CVE-2026-59200","aliases":["BIT-pillow-2026-59200","GHSA-jjj6-mw9f-p565","PYSEC-2026-3495"],"url":"https://o3.security/vulnerability/CVE-2026-59200","summary":"Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()","details":"Pillow is a Python imaging library. From 5.1.0 until 12.3.0, PdfParser.PdfStream.decode() in PIL/PdfParser.py calls zlib.decompress() with bufsize set to the PDF stream Length field without bounding the decompressed output size, allowing a crafted FlateDecode PDF stream to exhaust memory from a small file. This issue is fixed in version 12.3.0.","published":"2026-07-14T16:09:05.091Z","modified":"2026-08-27T18:26:02.901879029Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00385,"percentile":0.31349,"asOf":"2026-08-25"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pillow","fixedVersion":"12.3.0"}],"fix":{"url":"https://github.com/python-pillow/Pillow/commit/f7a31ea75e460e108c37126da1f47812f21f6b09","label":"python-pillow/Pillow@f7a31ea"},"references":[{"type":"WEB","url":"https://github.com/python-pillow/Pillow/releases/tag/12.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59200.json"},{"type":"ADVISORY","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-jjj6-mw9f-p565"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59200"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/commit/f7a31ea75e460e108c37126da1f47812f21f6b09"},{"type":"FIX","url":"https://github.com/python-pillow/Pillow/pull/9718"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T18:26:02.901879029Z"}}