High
kitty — security advisory
Kitty is a cross-platform GPU based terminal. In versions 0.47.0 and 0.47.1, `kitten dnd` can allow a malicious remote drag-and-drop source to overwrite or truncate arbitrary files writable by the local kitty user. Remote `text/uri-list` drops are staged in a temporary directory, but on case-sensitive filesystems duplicate remote basenames are not de-duplicated. An attacker can first create a staged symlink and then send a same-name regular-file entry. The regular-file write uses `utils.CreateAt()` / `openat(O_RDWR|O_CREAT|O_TRUNC)` without `O_NOFOLLOW`, so it follows the attacker-created symlink and writes outside the staging directory before final overwrite confirmation runs. This appears related in class to the file-transfer symlink advisory, but it is a different bug: it affects `kitten dnd` remote drag-and-drop staging, uses different vulnerable code (`kittens/dnd/drop.go` and `tools/utils/file_at_fd.go`), and reproduces on commit `4aa4a5c0567a92553a8c20a88a4352da637fca5d`, after the file-transfer `O_NOFOLLOW` fix. Version 0.47.2 patches the issue.
- Products
- kitty
- Affected versions
- 0.14.3-1, 0.14.4-1, 0.14.6-1, 0.15.0-1, 0.15.0-1build1, 0.15.0-1ubuntu0.2, 0.15.0-1ubuntu0.2+esm1, 0.19.3-1, 0.21.2-1, 0.21.2-1build1, 0.21.2-1ubuntu0.22.04.1, 0.21.2-1ubuntu0.22.04.1+esm1, 0.26.5-3ubuntu2, 0.26.5-5ubuntu1, 0.31.0-3, 0.31.0-4, 0.32.2-1, 0.32.2-1build2, 0.32.2-1build3, 0.32.2-1ubuntu0.1, 0.32.2-1ubuntu0.2, 0.32.2-1ubuntu0.3, 0.32.2-1ubuntu0.4, 0.32.2-1ubuntu0.4+esm1, 0.32.2-1ubuntu0.4+esm2, 0.39.1-1, 0.41.1-2, 0.41.1-2+deb13u1build0.25.10.1, 0.43.1-1, 0.44.0-1, 0.45.0-1, 0.45.0-1build1, 0.45.0-1ubuntu0.1~esm1, 0.45.0-1ubuntu0.1~esm2, 0.47.0-3, 0.47.4-1, 0.48.2-1.1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54056
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:45 UTC · Revision 1
Source evidence
Kitty is a cross-platform GPU based terminal. In versions 0.47.0 and 0.47.1, `kitten dnd` can allow a malicious remote drag-and-drop source to overwrite or truncate arbitrary files writable by the local kitty user. Remote `text/uri-list` drops are staged in a temporary directory, but on case-sensitive filesystems duplicate remote basenames are not de-duplicated. An attacker can first create a staged symlink and then send a same-name regular-file entry. The regular-file write uses `utils.CreateAt()` / `openat(O_RDWR|O_CREAT|O_TRUNC)` without `O_NOFOLLOW`, so it follows the attacker-created symlink and writes outside the staging directory before final overwrite confirmation runs. This appears related in class to the file-transfer symlink advisory, but it is a different bug: it affects `kitten dnd` remote drag-and-drop staging, uses different vulnerable code (`kittens/dnd/drop.go` and `tools/utils/file_at_fd.go`), and reproduces on commit `4aa4a5c0567a92553a8c20a88a4352da637fca5d`, after the file-transfer `O_NOFOLLOW` fix. Version 0.47.2 patches the issue.
osv:UBUNTU-CVE-2026-54056
kitty
Fixed versions: Not specified
kitty
Fixed versions: Not specified
kitty
Fixed versions: Not specified
kitty
Fixed versions: Not specified
kitty
Fixed versions: Not specified
kitty
Fixed versions: Not specified
Complete source record
{
"id": "55c32b459833a3a62cecf3bc66c568e888751f7f2cfc8e53cdb4b55b05125504",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-54056",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-54056",
"summary": "Kitty is a cross-platform GPU based terminal. In versions 0.47.0 and 0.47.1, `kitten dnd` can allow a malicious remote drag-and-drop source to overwrite or truncate arbitrary files writable by the local kitty user. Remote `text/uri-list` drops are staged in a temporary directory, but on case-sensitive filesystems duplicate remote basenames are not de-duplicated. An attacker can first create a staged symlink and then send a same-name regular-file entry. The regular-file write uses `utils.CreateAt()` / `openat(O_RDWR|O_CREAT|O_TRUNC)` without `O_NOFOLLOW`, so it follows the attacker-created symlink and writes outside the staging directory before final overwrite confirmation runs. This appears related in class to the file-transfer symlink advisory, but it is a different bug: it affects `kitten dnd` remote drag-and-drop staging, uses different vulnerable code (`kittens/dnd/drop.go` and `tools/utils/file_at_fd.go`), and reproduces on commit `4aa4a5c0567a92553a8c20a88a4352da637fca5d`, after the file-transfer `O_NOFOLLOW` fix. Version 0.47.2 patches the issue.",
"evidence": "osv:UBUNTU-CVE-2026-54056",
"products": [
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{
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{
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{
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{
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},
{
"value": "0.44.0-1",
"evidence": "/affected/5/versions"
},
{
"value": "0.45.0-1",
"evidence": "/affected/5/versions"
},
{
"value": "0.45.0-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "0.45.0-1ubuntu0.1~esm1",
"evidence": "/affected/5/versions"
},
{
"value": "0.45.0-1ubuntu0.1~esm2",
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"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
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"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L"
},
{
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L"
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],
"modified": "2026-10-17T12:59:03.299844585Z",
"provider": "osv",
"upstream": [
"CVE-2026-54056"
],
"references": [
"https://ubuntu.com/security/CVE-2026-54056",
"https://www.cve.org/CVERecord?id=CVE-2026-54056",
"https://github.com/kovidgoyal/kitty/security/advisories/GHSA-r892-cv7q-fw8x"
]
},
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{
"value": "CVE-2026-54056",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359245,
"published_at": "2026-06-12T21:16:00+00:00"
}