python-pillow Pillow up to 12.2.x FlateDecode PIL/PdfParser.py PdfParser.PdfStream.decode Field resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k2.05

Summaryinfo

A vulnerability was found in python-pillow Pillow up to 12.2.x and classified as problematic. This issue affects the function PdfParser.PdfStream.decode of the file PIL/PdfParser.py of the component FlateDecode Handler. Executing a manipulation of the argument Field can lead to resource consumption. This vulnerability is tracked as CVE-2026-59200. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in python-pillow Pillow up to 12.2.x and classified as problematic. This vulnerability affects the function PdfParser.PdfStream.decode of the file PIL/PdfParser.py of the component FlateDecode Handler. The manipulation of the argument field with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. CVE summarizes:

Pillow is a Python imaging library. From 5.1.0 until 12.3.0, PdfParser.PdfStream.decode() in PIL/PdfParser.py calls zlib.decompress() with bufsize set to the PDF stream Length field without bounding the decompressed output size, allowing a crafted FlateDecode PDF stream to exhaust memory from a small file. This issue is fixed in version 12.3.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-59200 since 07/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 12.3.0 eliminates this vulnerability.

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Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Pillow 12.3.0

Timelineinfo

07/02/2026 CVE reserved
07/14/2026 +12 days Advisory disclosed
07/14/2026 +0 days VulDB entry created
07/14/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-59200 (🔒)
GCVE (CVE): GCVE-0-2026-59200
GCVE (VulDB): GCVE-100-378382

Entryinfo

Created: 07/14/2026 19:07
Changes: 07/14/2026 19:07 (57)
Complete: 🔍
Cache ID: 216::103

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