美濃加茂まむ@superdoccimo
Python画像処理ライブラリPillowに深刻な脆弱性「CVE-2026-112398」が発覚。細工された画像を開くだけでヒープ破壊が発生し、特定条件下では任意コード実行の恐れも。 https://x.com/i/article/2114659861526978560
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CVE-2026-112398
LOWCVSS 9.2 · CRITICALSignal is active with 1 mentions in latest observed window
Immediate actions
- Track advisory updates for patch or workaround availability
Recommended action window: Monitor and triage in normal cycle
NVD description
Pillow is a Python imaging library. Prior to 13.0.0, Pillow's FlashPix JPEG-tile decoder can write decoded scanlines beyond the allocated tile buffer. FlashPix (FPX) JPEG decoding selects raw mode LA with two bytes per pixel, while an unrecognized JPEG mode can be decoded as JCS_UNKNOWN with four components, causing ImagingJpegDecode to write four-component scanlines into the two-byte tile buffer. An attacker can supply a crafted OLE2 FlashPix file to an application with the optional olefile dependency installed that opens or thumbnails untrusted input. This can corrupt heap memory and may allow arbitrary code execution. This issue is fixed in version 13.0.0.
0.0/ 10 priority
Sources & remediation
Other references
- https://github.com/python-pillow/Pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x8w-8jj5-q52h
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x8w-8jj5-q52h
Weakness type (CWE)
CWE-122CWE-787
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Threat summary
- 1 mentions across 1 observed day
What's happening
- 1 total mentions across 1 day
Deep dive
Activity timeline1 mentions / 1d
Referenced assets1 URL
By indicator