CVE-2026-55798mediumCWE-78

CVE-2026-55798: medium-severity vulnerability in python-pillow Pillow

Pillow: WindowsViewer.get_command() OS command injection via unescaped shell path

Published · Updated

Follow this CVE+ Monitor Pillow+ Monitor pillow

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.5epss 0.2%
Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Affected products
python-pillow · Pillow
Related CVEs — python-pillow Pillow

In the same product, most dangerous first.

CVE-2026-112900CRITICALPillow: Argument Injection in Ghostscript call, potentially leading into RCEEPSS 1.3%CVE-2026-112393CRITICALPillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIOEPSS 1.0%CVE-2026-112403CRITICALPillow: Heap buffer overflow in ImagingJpegDecodeEPSS 0.9%CVE-2026-112398CRITICALPillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code executionEPSS 0.7%CVE-2026-112396MEDIUMPillow: Heap use-after-free when encoding TIFF to an in-memory bufferEPSS 0.7%CVE-2026-40192HIGHPillow is vulnerable to a FITS GZIP decompression bombEPSS 0.7%