CVE-2026-96639 Pillow - Buffer Overflow

Pillow 11.0.0 to 13.0.0 contains a buffer overflow caused by stale ImagingCore allocation reuse in multi-frame loaders, letting attackers cause out-of-bounds writes, crashes, and potential command execution via crafted frames.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service, Out Of Bounds Rw
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-125

Vendor fix

Update to version 13.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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