CVE-2026-33633 — Kitty has a Heap Buffer Overflow in its Graphics Protocol Handler
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 termin…
Published: 2026-05-19 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7