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Critical Vulnerabilities in kitty Terminal Emulator Affect Multiple Ubuntu Releases

Critical Vulnerabilities in kitty Terminal Emulator Affect Multiple Ubuntu Releases

First seen 17 Jun 2026, 20:16 UTC • •
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ThreatCluster AI
ThreatCluster •June 18, 2026 at 19:53 UTC
  • •Critical vulnerabilities in kitty affect multiple Ubuntu versions, including 26.04 LTS.
  • •CVE-2026-33633 and CVE-2026-33642 allow denial of service and arbitrary code execution.
  • •Users must update and restart kitty to mitigate these security issues.

On June 17, 2026, Ubuntu announced security vulnerabilities in the kitty terminal emulator affecting several Ubuntu releases, including 26.04 LTS and earlier versions. Two critical issues were identified: CVE-2026-33633 and CVE-2026-33642, both published on May 19, 2026. These vulnerabilities allow attackers to exploit improperly handled image data and graphics commands, potentially causing denial of service or executing arbitrary code. Users are advised to update their systems to mitigate these risks. The affected versions include kitty 0.45.0-1ubuntu0.1~esm1 for Ubuntu 26.04 LTS and earlier versions down to 20.04 LTS. A system restart is required after applying the updates to ensure changes take effect.

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Timeline

2026-05-19
CVE-2026-33633 and CVE-2026-33642 published
Two critical vulnerabilities in kitty were published, affecting its handling of image data and graphics commands.
Ubuntu
2026-06-17
Ubuntu issues security notice USN-8442-1
Ubuntu announced critical vulnerabilities in kitty, advising users to update their systems immediately.
Linuxsecurity

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