BIT-pillow-2026-114501

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-114501.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-pillow-2026-114501
Aliases
Published
2026-10-29T08:57:44Z
Modified
2026-10-29T10:56:00Z
Summary
Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1
Details

Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.

Database specific 
{
    "cpes":  [
        "cpe:2.3:a:python:pillow:*:*:*:*:*:python:*:*"
    ],
    "severity":  "Medium"
}
References

Affected packages

Bitnami / pillow

Package

Name
pillow
Purl
pkg:bitnami/pillow

Severity

  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
11.2.1
Fixed
13.0.0

Database specific

source 
"https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-114501.json"