Pillow up to 12.2.x EPS parser PIL/EpsImagePlugin.py Image.open Count infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k2.08

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Pillow up to 12.2.x. The affected element is the function Image.open of the file PIL/EpsImagePlugin.py of the component EPS parser. Performing a manipulation of the argument Count results in infinite loop. This vulnerability is identified as CVE-2026-59203. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Pillow up to 12.2.x. This affects the function Image.open of the file PIL/EpsImagePlugin.py of the component EPS parser. The manipulation of the argument count with an unknown input leads to a infinite loop vulnerability. CWE is classifying the issue as CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. This is going to have an impact on availability. The summary by CVE is:

Pillow is a Python imaging library. From 12.0.0 through 12.2.0, Pillow's EPS parser in PIL/EpsImagePlugin.py accepts a negative byte count in the %%BeginBinary directive, allowing a crafted EPS file to cause Image.open() to seek backwards to the same directive and parse it repeatedly in an infinite loop. This issue is fixed in version 12.3.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-59203 since 07/02/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 12.3.0 eliminates this vulnerability.

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Productinfo

Name

Version

License

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

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

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / 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

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-59203 (🔒)
GCVE (CVE): GCVE-0-2026-59203
GCVE (VulDB): GCVE-100-378351

Entryinfo

Created: 07/14/2026 18:36
Changes: 07/14/2026 18:36 (55)
Complete: 🔍
Cache ID: 216::103

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