CVE-2026-90949: Gimp: gimp: heap-based buffer overflow in psp loader due to selection-channel geometry mismatch

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-14 · updated 2026-10-16
Weakness: CWE-787

Description

A flaw was found in GIMP's PSP (Paint Shop Pro) file loader. When processing a compressed selection channel, a heap-based buffer overflow can occur due to a mismatch between the allocated buffer size and the amount of data decompressed. A remote attacker could exploit this vulnerability by crafting a malicious PSP file. Opening this file in GIMP could lead to a crash or arbitrary code execution.

References

https://access.redhat.com/security/cve/CVE-2026-90949
https://bugzilla.redhat.com/show_bug.cgi?id=2533013
https://gitlab.gnome.org/GNOME/gimp/-/work_items/16753

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