CVE-2023-50447Public exploitNetwork attack vector

Code execution via unrestricted ImageMath environment keys

Published Jan 19, 2024 · Updated Aug 2, 2024

Code injection in Pillow 10.1.0 and earlier allows attackers to execute arbitrary code through crafted ImageMath.eval environment keys. ImageMath.eval uses caller-controlled environment keys to expand its expression-name allowlist, enabling double-underscore attribute traversal to reach Python objects and invoke system commands. Exploitation requires control of both the expression and environment keys, including preserved image filenames such as double-underscore method names; successful code runs with the host application's privileges.

CVSS severity8.1
High
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Code injection in Pillow 10.1.0 and earlier allows attackers to execute arbitrary code through crafted ImageMath.eval environment keys. ImageMath.eval uses caller-controlled environment keys to expand its expression-name allowlist, enabling double-underscore attribute traversal to reach Python objects and invoke system commands. Exploitation requires control of both the expression and environment keys, including preserved image filenames such as double-underscore method names; successful code runs with the host application's privileges.

The record

CVE
CVE-2023-50447
Published
Jan 19, 2024
Updated
Aug 2, 2024
Vendor
Pillow
Product
Pillow
Classifications
CWE-94, CWE-95, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=10.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pillow · Pillowversion=0 <=10.1.0

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo