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CVE-2026-112400— Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS

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 9.2.0 至 13.0.0 版本中，Pillow 在发生解压缩炸弹异常后，可能会保留被拒绝的 GIF 帧尺寸。在 方法中，一个特制的 GIF 文件可能在触发 异常后，仍将非法的尺寸信息保留在内存中；如果应用程序捕获该异常并继续处理同一个图像对象，后续的 或 操作便会依据这些非法尺寸进行内存分配，从而耗尽系统内存，导致拒绝服务（DoS）。该问题已在 13.0.0 版本中修复。

CVSS 8.7 · High
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I. Basic Information for CVE-2026-112400

Vulnerability Information
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Vulnerability Title
Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. From 9.2.0 until 13.0.0, Pillow can retain a rejected GIF frame size after a decompression-bomb exception. In GifImageFile._seek, a crafted GIF can leave rejected dimensions stored after Image.DecompressionBombError; if an application catches that exception and continues processing the same image object, later seek or load operations allocate according to those dimensions and can exhaust memory, denying service. 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:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
python-pillow Pillow >= 9.2.0, < 13.0.0 -

II. Public POCs for CVE-2026-112400

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III. Intelligence Information for CVE-2026-112400

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Other References for CVE-2026-112400 (3)

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-2026-112896 8.8 HIGH Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read
CVE-2026-112404 8.8 HIGH Pillow: OOB read in TiffDecode.c tile and RGBA paths leaks heap memory into pixels
CVE-2026-112897 8.7 HIGH Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips
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-2026-112894 8.7 HIGH Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id)
CVE-2026-112402 8.7 HIGH Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform
CVE-2026-112397 8.7 HIGH Pillow: Out-of-bounds access in _imagingmorph on a zero-width image
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-2026-112390 8.2 HIGH Pillow: Infinite loop in MIC n_frames when the embedded TIFF
CVE-2026-112893 8.2 HIGH Pillow: Invalid free in FreeType glyph rendering when a stroker is active
CVE-2026-112901 6.9 MEDIUM Pillow: ReDoS in XbmImagePlugin: 512-byte file stalls Image.open() for minutes
CVE-2026-112898 6.9 MEDIUM Pillow: Image.quantize() with empty palette leaks uninitialized stack memory

Showing top 20 of 27 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Pillow
Same vendor: python-pillow
Same weakness: CWE-400

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