CVE catalog
CVE-2026-54055
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the
- Severity
- High · CVSS 7.8
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.07% · Oct 25, 2026
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | kitty | sid | 0.48.2-1.1 | fixed |
| Debian | kitty | forky | 0.48.2-1.1 | fixed |
| Debian | kitty | trixie | 0.41.1-2+deb13u2 | fixed |
| Debian | kitty | trixie-security | 0.41.1-2+deb13u2 | fixed |
| Debian | kitty | bookworm | 0.26.5-5 | vulnerable |
| Cpe | kitty | Not reported | Not reported | vulnerable |
| Cpe | kitty | Not reported | 0.47.2 | fixed |
| Ubuntu | kitty | noble | 0.32.2-1ubuntu0.4+esm2 | fixed |
| Ubuntu | kitty-doc | noble | 0.32.2-1ubuntu0.4+esm2 | fixed |
| Ubuntu | kitty-shell-integration | noble | 0.32.2-1ubuntu0.4+esm2 | fixed |
| Ubuntu | kitty-terminfo | noble | 0.32.2-1ubuntu0.4+esm2 | fixed |
| Ubuntu | kitty | pro | 0.41.1-2 | vulnerable |
| Ubuntu | kitty | pro | 0.43.1-1 | vulnerable |
| Ubuntu | kitty | pro | 0.44.0-1 | vulnerable |
| Ubuntu | kitty | pro | 0.45.0-1 | vulnerable |
| Ubuntu | kitty | pro | 0.45.0-1build1 | vulnerable |
| Ubuntu | kitty | pro | 0.45.0-1ubuntu0.1~esm1 | vulnerable |
| Ubuntu | kitty | pro | 0.45.0-1ubuntu0.1~esm2 | fixed |
| Ubuntu | kitty | 25.10 | 0.39.1-1 | vulnerable |
| Ubuntu | kitty | 25.10 | 0.41.1-2 | vulnerable |
| Ubuntu | kitty | 25.10 | 0.41.1-2+deb13u1build0.25.10.1 | vulnerable |
| Cpe | kitty | Not reported | 0.47.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | kitty | source | sid | 0.47.3-1 | not yet assigned | Not reported | [1139898] |
| Debian | kitty | source | forky | 0.47.3-1 | not yet assigned | Not reported | [1139898] |
| Debian | kitty | source | trixie | 0.41.1-2+deb13u2 | not yet assigned | Not reported | [1139898] |
| Debian | kitty | source | bookworm | (unfixed) | not yet assigned | Not reported | [1139898] |
| Cpe | kitty | cpe | Not reported | 0.47.2 | Not reported | Not reported | Not reported |
| Ubuntu | kitty | deb | noble | 0.32.2-1ubuntu0.4+esm2 | Not reported | Not reported | Not reported |
| Ubuntu | kitty-doc | deb | noble | 0.32.2-1ubuntu0.4+esm2 | Not reported | Not reported | Not reported |
| Ubuntu | kitty-shell-integration | deb | noble | 0.32.2-1ubuntu0.4+esm2 | Not reported | Not reported | Not reported |
| Ubuntu | kitty-terminfo | deb | noble | 0.32.2-1ubuntu0.4+esm2 | Not reported | Not reported | Not reported |
| Ubuntu | kitty | deb | pro | 0.45.0-1ubuntu0.1~esm2 | Not reported | UBUNTU-CVE-2026-54055 | Not reported |
| Cpe | kitty | cpe | Not reported | 0.47.2 | Not reported | NVD-CVE-2026-54055 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [kitty]Affected
Details (2)
0.26.5-5· amd64 · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
0.26.5-5· arm64 · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
- [kitty-doc]Affected
Source package: [kitty]
Details (2)
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
- [kitty-shell-integration]Affected
Source package: [kitty]
Details (2)
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
- [kitty-terminfo]Affected
Source package: [kitty]
Details (2)
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
0.26.5-5· all · bookwormAffected
nvd · kitty · debian · bookworm; nvd · kitty · debian · 12
[Debian 13 (Trixie)]
- [kitty]Affected
Details (4)
0.41.1-2+deb13u1· amd64 · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u1· arm64 · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· amd64 · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· arm64 · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
- [kitty-doc]Affected
Source package: [kitty]
Details (4)
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
- [kitty-shell-integration]Affected
Source package: [kitty]
Details (4)
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
- [kitty-terminfo]Affected
Source package: [kitty]
Details (4)
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u1· all · trixieAffected · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
0.41.1-2+deb13u2· all · trixie-securityFixed · Fixed:
0.41.1-2+deb13u2nvd · kitty · debian · 13
Observed:
References
- [https://github.com/kovidgoyal/kitty/security/advisories/GHSA-q446-x7q6-vcxh]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54055]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54055]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-54055]
- [https://security-tracker.debian.org/tracker/CVE-2026-54055]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54055.json]
- [https://ubuntu.com/security/notices/USN-8763-1]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [Ubuntu Security Notices (USN)]