CVE-2026-112394— Pillow: P;2L and P;4L decoders may read 1 to 3 bytes past the passed buffer size
Quick assessment
Affected
python-pillow Pillow
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Pillow 是一个 Python 图像处理库。在 13.0.0 版本之前，Pillow 的 P;2L 和 P;4L 原始（raw）解码器可能会读取输入缓冲区末尾之后的数据。ImagingRawDecode 函数计算的是打包像素的行大小，而解包器（unpackers）则分别读取带有填充的位平面。调用者可以提供一个缓冲区及图像尺寸，使得该组合的接受尺寸小于解包器实际所需的空间。这可能导致输出像素中泄露最多三个相邻的堆字节，或导致进程崩溃。该问题已在 13.0.0 版本中修复。
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I. Basic Information for CVE-2026-112394
Vulnerability Information
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Vulnerability Title
Pillow: P;2L and P;4L decoders may read 1 to 3 bytes past the passed buffer size
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's P;2L and P;4L raw decoders can read past the end of an input buffer. ImagingRawDecode calculates a packed-pixel row size, while the unpackers read separately padded bit planes. A caller can supply a buffer and image dimensions whose accepted size is smaller than the unpacker's actual footprint. This can disclose up to three adjacent heap bytes in output pixels or crash the process. This issue is fixed in version 13.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| python-pillow | Pillow | < 13.0.0 | - |
|
II. Public POCs for CVE-2026-112394
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-112394 (3)
-
https://github.com/python-pillow/Pillow/releases/tag/13.0.0 x_refsource_MISC
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https://github.com/python-pillow/Pillow/security/advisories/GHSA-4558-3h8r-v8xp x_refsource_CONFIRM
Same Patch Batch · python-pillow · 2026-10-19 · 27 CVEs total
| CVE-2026-112393 | 9.2 CRITICAL | Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO |
| CVE-2026-112900 | 9.2 CRITICAL | Pillow: Argument Injection in Ghostscript call, potentially leading into RCE |
| CVE-2026-112403 | 9.2 CRITICAL | Pillow: Heap buffer overflow in ImagingJpegDecode |
| CVE-2026-112398 | 9.2 CRITICAL | Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution |
| CVE-2026-112404 | 8.8 HIGH | Pillow: OOB read in TiffDecode.c tile and RGBA paths leaks heap memory into pixels |
| CVE-2026-112896 | 8.8 HIGH | Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read |
| CVE-2026-112397 | 8.7 HIGH | Pillow: Out-of-bounds access in _imagingmorph on a zero-width image |
| CVE-2026-112897 | 8.7 HIGH | Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips |
| CVE-2026-112894 | 8.7 HIGH | Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id) |
| CVE-2026-112895 | 8.7 HIGH | Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for C |
| CVE-2026-112405 | 8.7 HIGH | Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0 |
| CVE-2026-112892 | 8.7 HIGH | Pillow: MSP RLE decoder expands a tiny file into unbounded memory |
| CVE-2026-112406 | 8.7 HIGH | Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle |
| CVE-2026-112400 | 8.7 HIGH | Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS |
| CVE-2026-112402 | 8.7 HIGH | Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform |
| CVE-2026-112399 | 8.7 HIGH | Pillow: APNG background disposal allocates full canvas before decompression bomb check |
| CVE-2026-112392 | 8.2 HIGH | Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images |
| CVE-2026-112893 | 8.2 HIGH | Pillow: Invalid free in FreeType glyph rendering when a stroker is active |
| CVE-2026-112390 | 8.2 HIGH | Pillow: Infinite loop in MIC n_frames when the embedded TIFF |
| CVE-2026-112891 | 6.9 MEDIUM | Pillow: Quadratic GIF comment copying during save |
Showing top 20 of 27 CVEs. View all on vendor page → →
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