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CVE-2026-54057 kovidgoyal CVE debrief

CVE-2026-54057 is a HIGH severity vulnerability in Kitty, a cross-platform GPU-based terminal. Versions prior to 0.47.3 are affected by an OSC 21 color-control query reply injection issue. An attacker can inject arbitrary bytes, including newlines, into the shell's input without sanitization. This vulnerability is addressed in version 0.47.3.

Vendor
kovidgoyal
Product
kitty
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-16
Advisory published
2026-06-12
Advisory updated
2026-06-16

Who should care

Users of Kitty terminal versions prior to 0.47.3 should update to the latest version to mitigate this vulnerability.

Technical summary

Kitty's OSC 21 (color-control) query reply reflects attacker-controlled bytes into the shell's input without sanitization. This allows an attacker to inject arbitrary input, potentially leading to code execution or other malicious activities.

Defensive priority

HIGH

Recommended defensive actions

  • Update Kitty to version 0.47.3 or later.

Evidence notes

CVE-2026-54057 has a CVSS score of 7.3 and is classified as HIGH severity. The vulnerability is addressed in Kitty version 0.47.3.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-54057 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-54057

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-54057 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-54057

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.