CVE-2026-112896— Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
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 TIFF 编码器在保留的 TIFF 元数据中，若平面大小（plane size）与 BitsPerSample 不一致，可能会读取超出 ColorMap 缓冲区范围的数据。攻击者可构造一个极小的 TIFF 文件，使其正常打开后保留一个精心设计的 ColorMap；当该图像被保存时，此 ColorMap 会被复用。若应用程序使用 libtiff 对攻击者提供的 TIFF 文件进行重新编码，即可触发越界读取漏洞。该漏洞可能导致
Possible ATT&CK Techniques 3 AI
T1055.001 · Dynamic-link Library Injection T1562.002 T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-112896
Vulnerability Information
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Vulnerability Title
Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's TIFF encoder can read beyond a ColorMap buffer when retained TIFF metadata has a plane size inconsistent with BitsPerSample. A small TIFF can be opened normally and then retain a crafted ColorMap that is reused when the image is saved. An application that re-encodes the attacker's TIFF with libtiff can trigger the out-of-bounds read. This can disclose heap memory in the output 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:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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-2026-112896
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-112896 (1)
Vendor Advisories for CVE-2026-112896 (1)
Vendor Pages for CVE-2026-112896 (1)
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🔗 Release 13.0.0 · python-pillow/Pillow · GitHub x_refsource_MISC
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-2026-112403 | 9.2 CRITICAL | Pillow: Heap buffer overflow in ImagingJpegDecode |
| CVE-2026-112900 | 9.2 CRITICAL | Pillow: Argument Injection in Ghostscript call, potentially leading into RCE |
| 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-2026-112895 | 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-2026-112399 | 8.7 HIGH | Pillow: APNG background disposal allocates full canvas before decompression bomb check |
| CVE-2026-112397 | 8.7 HIGH | Pillow: Out-of-bounds access in _imagingmorph on a zero-width image |
| CVE-2026-112402 | 8.7 HIGH | Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform |
| CVE-2026-112897 | 8.7 HIGH | Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips |
| CVE-2026-112400 | 8.7 HIGH | Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS |
| CVE-2026-112894 | 8.7 HIGH | Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id) |
| CVE-2026-112406 | 8.7 HIGH | Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle |
| CVE-2026-112893 | 8.2 HIGH | Pillow: Invalid free in FreeType glyph rendering when a stroker is active |
| CVE-2026-112392 | 8.2 HIGH | Pillow: NULL dereference in ImagingExpand via rank filters on zero-size images |
| CVE-2026-112390 | 8.2 HIGH | Pillow: Infinite loop in MIC n_frames when the embedded TIFF |
| CVE-2026-112898 | 6.9 MEDIUM | Pillow: Image.quantize() with empty palette leaks uninitialized stack memory |
| CVE-2026-112901 | 6.9 MEDIUM | Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes |
Showing top 20 of 27 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Pillow
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CVE-2026-112901
Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image. -
CVE-2026-112900
Pillow: Argument Injection in Ghostscript call, potentially -
CVE-2026-112898
Pillow: Image.quantize() with empty palette leaks uninitiali -
CVE-2026-112897
Pillow: TiffDecode returns uninitialized memory as pixels fo -
CVE-2026-112895
Pillow: Unbounded recursion parsing a PDF page tree or trail
Same vendor: python-pillow
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CVE-2026-112901
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CVE-2026-112897
Pillow: TiffDecode returns uninitialized memory as pixels fo -
CVE-2026-112895
Pillow: Unbounded recursion parsing a PDF page tree or trail
Same weakness: CWE-125
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