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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-jjj6-mw9f-p565 | Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode() |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 16 Jul 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-409 | |
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
Tue, 14 Jul 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 14 Jul 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Python-pillow
Python-pillow pillow |
|
| Vendors & Products |
Python-pillow
Python-pillow pillow |
Tue, 14 Jul 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode() | |
| Weaknesses | CWE-400 CWE-770 |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-14T19:52:06.407Z
Reserved: 2026-07-02T19:53:48.831Z
Link: CVE-2026-59200
Updated: 2026-07-14T19:43:56.053Z
No data.
OpenCVE Enrichment
Updated: 2026-07-22T10:00:10Z
Github GHSA