CVE-2026-112401— Pillow: Quadratic GIF comment concatenation allows DoS in Image.open()
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 5.4.0 到 13.0.0 版本之间，Pillow 在解析 GIF 注释时会执行二次复制操作。 方法会反复为注释子块和多个注释扩展追加不可变的字节序列，而图像的第零帧会在调用 时进行解析。攻击者可以向任何打开该文件的程序提交一个尺寸很小但包含大量注释扩展的 GIF 文件。这会导致 CPU 资源被过度消耗，在应用程序有机会检查图像之前造成拒绝服务（DoS）。该问题已在 13.0.0 版本中修复。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-112401
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Pillow: Quadratic GIF comment concatenation allows DoS in Image.open()
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. From 5.4.0 until 13.0.0, Pillow performs quadratic copying while parsing GIF comments. GifImageFile._seek() repeatedly appends immutable bytes for comment sub-blocks and multiple comment extensions, and frame zero is parsed during Image.open(). An attacker can submit a small-dimension GIF containing many comment extensions to any application that opens the file. This can consume excessive CPU and deny service before the application can inspect the image. 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:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| python-pillow | Pillow | >= 5.4.0, < 13.0.0 | - |
|
II. Public POCs for CVE-2026-112401
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-112401
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-112401 (1)
Vendor Advisories for CVE-2026-112401 (1)
Vendor Pages for CVE-2026-112401 (1)
-
🔗 Release 13.0.0 · python-pillow/Pillow · GitHub x_refsource_MISC
Same Patch Batch · python-pillow · 2026-10-19 · 27 CVEs total
| CVE-2026-112403 | 9.2 CRITICAL | Pillow: Heap buffer overflow in ImagingJpegDecode |
| CVE-2026-112393 | 9.2 CRITICAL | Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO |
| CVE-2026-112398 | 9.2 CRITICAL | Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution |
| CVE-2026-112900 | 9.2 CRITICAL | Pillow: Argument Injection in Ghostscript call, potentially leading into RCE |
| 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-2026-112399 | 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-2026-112400 | 8.7 HIGH | Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS |
| CVE-2026-112897 | 8.7 HIGH | Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG strips |
| CVE-2026-112406 | 8.7 HIGH | Pillow: Infinite loop in PdfParser.rewrite_pages on page tree Parent cycle |
| CVE-2026-112892 | 8.7 HIGH | Pillow: MSP RLE decoder expands a tiny file into unbounded memory |
| CVE-2026-112405 | 8.7 HIGH | Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0 |
| CVE-2026-112895 | 8.7 HIGH | Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for C |
| CVE-2026-112894 | 8.7 HIGH | Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id) |
| 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-2026-112898 | 6.9 MEDIUM | Pillow: Image.quantize() with empty palette leaks uninitialized stack memory |
Showing top 20 of 27 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Pillow
-
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-2026-112896
Pillow: TIFF encoder ColorMap plane-size mismatch causes a h
Same vendor: python-pillow
-
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-2026-112896
Pillow: TIFF encoder ColorMap plane-size mismatch causes a h
Same weakness: CWE-407
-
CVE-2026-112894
Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_o -
CVE-2026-112891
Pillow: Quadratic GIF comment copying during save -
CVE-2026-110688
Cpanel::JSON::XS versions from 4.51 before 4.80 for Perl all -
CVE-2026-110755
Text::CSV_XS versions before 1.65 for Perl allow quadratic C -
CVE-2026-101021
J4Care dcm4che Inefficient Algorithmic Complexity
V. Comments for CVE-2026-112401
No comments yet