CVE-2026-33642

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Source
https://cve.org/CVERecord?id=CVE-2026-33642
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33642.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33642
Aliases
  • GHSA-qfgm-2c64-6x3x
Downstream
Published
2026-05-19T18:04:42.482Z
Modified
2026-08-12T15:33:28.462235Z
Severity
  • 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H CVSS Calculator
Summary
Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check
Details

Kitty is a cross-platform GPU based terminal. In versions 0.46.2 and below, the handlecomposecommand() function in kitty/graphics.c performs bounds validation on composition offsets using unsigned 32-bit arithmetic that is subject to integer wrapping, potentially leading to Heap Buffer Over-Read/Write. An attacker who can write escape sequences to a kitty terminal (e.g., via a malicious file, SSH login banner, or piped content) can supply crafted xoffset/yoffset values that pass the bounds check after wrapping but cause massive out-of-bounds heap memory access in compose_rectangles(). No user interaction is required. No non-default configuration is required. The attacker only needs the ability to produce output in a kitty terminal window. This issue has been fixed in version 0.47.0.

Database specific 
{
    "cwe_ids": [
        "CWE-125",
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33642.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/kovidgoyal/kitty

Affected ranges

Type
GIT
Repo
https://github.com/kovidgoyal/kitty
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
eadec09d499b6a1332fc75960a51abb1645d26ab
Fixed
e9661f0f3afb4e4dbffa509adfb3df3c9780ad34
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:kovidgoyal:kitty:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.47.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

Other
nightly
v0.*
v0.1.0
v0.10.0
v0.10.1
v0.11.0
v0.11.1
v0.11.2
v0.11.3
v0.12.0
v0.12.1
v0.12.2
v0.12.3
v0.13.0
v0.13.1
v0.13.2
v0.13.3
v0.14.0
v0.14.1
v0.14.2
v0.14.3
v0.14.4
v0.14.5
v0.14.6
v0.15.0
v0.15.1
v0.16.0
v0.17.0
v0.17.1
v0.17.2
v0.17.3
v0.17.4
v0.18.0
v0.18.1
v0.18.2
v0.18.3
v0.19.0
v0.19.1
v0.19.2
v0.19.3
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.20.0
v0.20.1
v0.20.2
v0.20.3
v0.21.0
v0.21.1
v0.21.2
v0.22.0
v0.22.1
v0.22.2
v0.23.0
v0.23.1
v0.24.0
v0.24.1
v0.24.2
v0.24.3
v0.24.4
v0.25.0
v0.25.1
v0.25.2
v0.26.0
v0.26.1
v0.26.2
v0.26.3
v0.26.4
v0.26.5
v0.27.0
v0.27.1
v0.28.0
v0.28.1
v0.29.0
v0.29.1
v0.29.2
v0.3.0
v0.30.0
v0.30.1
v0.31.0
v0.32.0
v0.32.1
v0.32.2
v0.33.0
v0.33.1
v0.34.0
v0.34.1
v0.35.0
v0.35.1
v0.35.2
v0.36.0
v0.36.1
v0.36.2
v0.36.3
v0.36.4
v0.37.0
v0.38.0
v0.38.1
v0.39.0
v0.39.1
v0.4.0
v0.4.1
v0.4.2
v0.40.0
v0.40.1
v0.41.0
v0.41.1
v0.42.0
v0.42.1
v0.42.2
v0.43.0
v0.43.1
v0.44.0
v0.45.0
v0.46.0
v0.46.1
v0.46.2
v0.5.0
v0.5.1
v0.6.0
v0.6.1
v0.7.0
v0.7.1
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.9.0
v0.9.1

Database specific

vanir_signatures_modified 
"2026-08-12T15:33:28Z"
vanir_signatures 
[
    {
        "id": "CVE-2026-33642-82a3527e",
        "deprecated": false,
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "length": 2849.0,
            "function_hash": "280457416764156885754909861011681358664"
        },
        "source": "https://github.com/kovidgoyal/kitty/commit/e9661f0f3afb4e4dbffa509adfb3df3c9780ad34",
        "target": {
            "function": "handle_compose_command",
            "file": "kitty/graphics.c"
        }
    },
    {
        "id": "CVE-2026-33642-dc1e4042",
        "deprecated": false,
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "280709711047299294137574032014209459525",
                "85346557336307736872440387771568660609",
                "170879151890253140071227728881778440264",
                "317350391922474406785069908614255195877",
                "133081243175796015896384702204921414521",
                "236223751530012832227288039874492638852"
            ]
        },
        "source": "https://github.com/kovidgoyal/kitty/commit/e9661f0f3afb4e4dbffa509adfb3df3c9780ad34",
        "target": {
            "file": "kitty/graphics.c"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33642.json"