CVE-2026-59991 psd-tools - Denial of Service

psd-tools prior to 1.17.4 contains a denial of service caused by unvalidated attacker-controlled PSD header geometry in PSDImage.composite() and PSDImage.numpy(), letting attackers cause excessive memory allocation and service termination, exploit requires processing crafted PSD files.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.52% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-789

Vendor fix

Update to version 1.17.4 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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