CVE-2026-59199
HIGHCVSS v3
7.5
HIGH
EPSS Score
—
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 7/14/2026
- Last Modified
- 7/14/2026
Frequently Asked Questions
What is CVE-2026-59199?
Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.
Is CVE-2026-59199 actively exploited?
Active exploitation of CVE-2026-59199 has not been confirmed. The EPSS score is N/A%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-59199?
CVE-2026-59199 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
Is CVE-2026-59199 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.