CVE-2026-112393Critical· 9.2▾ AbyssalPoC availablePillow is a Python imaging library. From 2.0.0 until 13.0.0, Pillow has a heap buffer overflow and stale-heap disclosure in _tiffWriteProc when saving compressed TIFF data through libtiff to a target without a usable fileno(), such as By…
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 50.6 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Pillow is a Python imaging library. From 2.0.0 until 13.0.0, Pillow has a heap buffer overflow and stale-heap disclosure in _tiffWriteProc when saving compressed TIFF data through libtiff to a target without a usable fileno(), such as BytesIO. The callback sizes its allocation from the prior buffer size instead of the current write position, allowing an attacker-controlled out-of-line TIFF tag or retained ICC profile to be copied beyond the allocation after libtiff seeks forward. This overflow can crash the process and may allow code execution. Independently, unwritten alignment gaps in compressed TIFF output larger than 64 KiB can disclose stale heap bytes without a crafted tag. File paths and targets with real file descriptors are unaffected. This issue is fixed in version 13.0.0.
Pillow >= 2.0.0, < 13.0.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-112395Medium· 6.5Pillow tiled-TIFF decoder reads past tile buffer in copy4 (Unpack.c:1290)
CVE-2026-112398Critical· 9.2Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution
CVE-2026-112403Critical· 9.2Pillow: Heap buffer overflow in ImagingJpegDecode
CVE-2026-112397High· 8.7Pillow: Out-of-bounds access in _imagingmorph on a zero-width image
CVE-2026-112402High· 8.7Pillow: Double free in ImagingScaleAffine on calloc failure via Image.transform
CVE-2026-112900Critical· 9.2Pillow: Argument Injection in Ghostscript call, potentially leading into RCE