BIT-pillow-2026-96642

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-96642.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-pillow-2026-96642
Aliases
Published
2026-10-29T08:58:18Z
Modified
2026-10-29T10:55:45Z
Summary
Pillow: TarIO negative size field causes infinite CPU-spin loop
Details

Pillow is a Python imaging library. Prior to 13.0.0, the TarIO initializer in src/PIL/TarIO.py accepts a negative octal member size and computes a backward seek that returns to the same 512-byte header. When the requested member name does not match, the parser repeatedly reads that header, consumes a full CPU core, and never returns. TarIO is reached only when an application directly uses PIL.TarIO.TarIO rather than the default Image.open() path. This issue is fixed in version 13.0.0.

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

Affected packages

Bitnami / pillow

Package

Name
pillow
Purl
pkg:bitnami/pillow

Severity

  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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
0 Unknown introduced version / All previous versions are affected
Fixed
13.0.0

Database specific

source 
"https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-96642.json"