PYSEC-2026-4330

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/pillow/PYSEC-2026-4330.yaml
JSON Data
https://api.osv.dev/v1/vulns/PYSEC-2026-4330
Aliases
Published
2026-10-19T22:17:07Z
Modified
2026-10-28T11:10:48Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

PyPI / pillow

Package

Name
pillow
View open source insights on deps.dev
Purl
pkg:pypi/pillow

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
13.0.0

Affected versions

1.*
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7.0
1.7.1
1.7.2
1.7.3
1.7.4
1.7.5
1.7.6
1.7.7
1.7.8
2.*
2.0.0
2.1.0
2.2.0
2.2.1
2.2.2
2.3.0
2.3.1
2.3.2
2.4.0
2.5.0
2.5.1
2.5.2
2.5.3
2.6.0
2.6.1
2.6.2
2.7.0
2.8.0
2.8.1
2.8.2
2.9.0
3.*
3.0.0
3.1.0.rc1
3.1.0rc1
3.1.0
3.1.1
3.1.2
3.2.0
3.3.0
3.3.1
3.3.2
3.3.3
3.4.0
3.4.1
3.4.2
4.*
4.0.0
4.1.0
4.1.1
4.2.0
4.2.1
4.3.0
5.*
5.0.0
5.1.0
5.2.0
5.3.0
5.4.0.dev0
5.4.0
5.4.1
6.*
6.0.0
6.1.0
6.2.0
6.2.1
6.2.2
7.*
7.0.0
7.1.0
7.1.1
7.1.2
7.2.0
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.2.0
8.3.0
8.3.1
8.3.2
8.4.0
9.*
9.0.0
9.0.1
9.1.0
9.1.1
9.2.0
9.3.0
9.4.0
9.5.0
10.*
10.0.0
10.0.1
10.1.0
10.2.0
10.3.0
10.4.0
11.*
11.0.0
11.1.0
11.2.1
11.3.0
12.*
12.0.0
12.1.0
12.1.1
12.2.0
12.3.0

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/pillow/PYSEC-2026-4330.yaml"