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CVE-2026-59199— Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow

CVSS 7.5 · High EPSS 0.39% · P31

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProductVersion RangeStatus
python-pillowPillow< 12.3.0affected
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I. Basic Information for CVE-2026-59199

Vulnerability Information
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Vulnerability Title
Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
python-pillow Pillow 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
python-pillow Pillow是python-pillow的图像处理库。 python-pillow Pillow 12.3.0之前版本存在安全漏洞，该漏洞源于在Image.paste()、Image.crop()或Image.alpha_composite()函数中，当给定接近32位有符号整数边界的坐标时，会触发原生堆越界写入，导致容易受到拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
python-pillowPillow < 12.3.0 -

II. Public POCs for CVE-2026-59199

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7303 chars
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III. Intelligence Information for CVE-2026-59199

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Patches & Fixes for CVE-2026-59199 (2)

Vendor Advisories for CVE-2026-59199 (1)

Vendor Pages for CVE-2026-59199 (1)

Same Patch Batch · python-pillow · 2026-07-14 · 8 CVEs total

CVE-2026-591978.2 HIGHPillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow i
CVE-2026-592057.5 HIGHPillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode
CVE-2026-592007.5 HIGHPillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()
CVE-2026-591986.5 MEDIUMPillow TGA RLE encoder can serialize up to ~57 KB of adjacent heap data into generated ima
CVE-2026-592035.3 MEDIUMPillow EpsImagePlugin negative %%BeginBinary byte count causes infinite loop denial of ser
CVE-2026-59204Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial o
CVE-2026-54058Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIda

IV. Related Vulnerabilities

Same product: Pillow
Same vendor: python-pillow
Same weakness: CWE-190

V. Comments for CVE-2026-59199

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