by Kastro
Paper/Archive/CVE-2026-112403

CVE-2026-112403

python-pillow Pillow — Pillow: Heap buffer overflow in ImagingJpegDecode

EPSS 0.9%public exploitCVSS 9.8
critical.is priorityof 100
52
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 61.0.610 × 2012.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's JPEG decoder can write a full-width scanline into a buffer sized for a requested draft scale. ImagingJpegDecode does not verify libjpeg's actual output width and component count after scaling is requested, and an 8-bit lossless SOF3 JPEG decoded by a build linked to libjpeg-turbo 3.x can ignore the requested downscaling geometry. An attacker can supply such a JPEG to an application that uses draft() or thumbnail() to request downscaling. This can corrupt heap memory, crash the process, or potentially allow code execution. Older libjpeg-turbo 2.x and IJG builds reject the SOF3 input. This issue is fixed in version 13.0.0.

Affected

ProductAffectedFixed inSource
Pillow< 13.0.0–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/python-pillow/Pillow/security/advisories/GHSA-8g5g-8vmr-9782refgithub.com/python-pillow/Pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75refgithub.com/python-pillow/Pillow/releases/tag/13.0.0