CVE-2026-112393 Pillow - Buffer Overflow

Pillow 2.0.0 to 13.0.0 contains a heap buffer overflow and stale-heap disclosure caused by incorrect allocation sizing in _tiffWriteProc when saving compressed TIFF data to targets without usable fileno(), letting attackers cause crashes or code execution, exploit requires saving TIFF to non-file targets like BytesIO.

CVSS base score 9.2 /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, Information Disclosure
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-122

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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