CVE-2026-42310
Pillow has a PDF Parsing Trailer Infinite Loop (DoS)
5.5
MEDIUM
CVSS 3.1
EPSS 0.01%
Description
Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.
How to fix CVE-2026-42310
To remediate CVE-2026-42310, upgrade the affected package to a fixed version below.
- —upgrade to 12.2.0 or later
- —no fix listed
- —upgrade to 12.2.0 or later
Is CVE-2026-42310 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 4.2.0, < 12.2.0
- from 0
- >= 4.2.0, < 12.2.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |