CVE-2026-33633
Severity CVSS v4.0:
Pending analysis
Type:
CWE-122
Heap-based Buffer Overflow
Publication date:
19/05/2026
Last modified:
19/05/2026
Description
Kitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in load_image_data() that allows any process which can write to the terminal's stdin to crash kitty immediately. The vulnerability is triggered by a single APC graphics protocol command with a PNG format declaration (f=100) whose payload exceeds twice the initial buffer capacity. The overflow is attacker-controlled in both length and content, causing DoS and potentially escalation to RCE itself. This issue has been fixed in version 0.47.0.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH