BIT-pillow-2026-96637

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Import Source

https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-96637.json

JSON Data

https://api.osv.dev/v1/vulns/BIT-pillow-2026-96637

Aliases

Published

2026-10-29T08:58:11Z

Modified

2026-10-29T10:55:56Z

Summary

Pillow: Decompression bomb check bypass in SpiderImagePlugin.seek() leads to unbounded allocation DoS

Details

Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. 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-2026-96637.json"