Low
runc, runc-app and 1 more products — security advisory
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.
- Products
- runc, runc-app, runc-stable
- Affected versions
- 0.0.8+dfsg-2, 0.1.1-0ubuntu5~16.04, 1.0.0~rc1-0ubuntu1~16.04, 1.0.0~rc1-0ubuntu2~16.04.1, 1.0.0~rc1-0ubuntu2~16.04.1.1, 1.0.0~rc10-0ubuntu1, 1.0.0~rc10-0ubuntu1~18.04.1, 1.0.0~rc10-0ubuntu1~18.04.2, 1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1, 1.0.0~rc2+docker1.13.1-0ubuntu1, 1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1, 1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2, 1.0.0~rc2-0ubuntu2~16.04.1, 1.0.0~rc4+dfsg1-2, 1.0.0~rc4+dfsg1-6, 1.0.0~rc4+dfsg1-6ubuntu0.18.04.1, 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3, 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4, 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1, 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2, 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4, 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1, 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2, 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2+esm1, 1.0.0~rc8+git20190923.3e425f80-0ubuntu1, 1.0.0~rc93-0ubuntu1~18.04.1, 1.0.0~rc93-0ubuntu1~18.04.2, 1.0.0~rc93-0ubuntu1~20.04.1, 1.0.0~rc93-0ubuntu1~20.04.2, 1.0.0~rc95-0ubuntu1~18.04.1, 1.0.0~rc95-0ubuntu1~18.04.2, 1.0.0~rc95-0ubuntu1~20.04.1, 1.0.0~rc95-0ubuntu1~20.04.2, 1.0.1-0ubuntu2, 1.0.1-0ubuntu2~18.04.1, 1.0.1-0ubuntu2~20.04.1, 1.0.1-0ubuntu3, 1.0.3-0ubuntu1, 1.1.0-0ubuntu1, 1.1.0-0ubuntu1.1, 1.1.0-0ubuntu1~18.04.1, 1.1.0-0ubuntu1~20.04.1, 1.1.0-0ubuntu1~20.04.2, 1.1.10+ds1-1ubuntu1, 1.1.10+ds1-1ubuntu2, 1.1.10-0ubuntu1, 1.1.12+ds1-1ubuntu1, 1.1.12+ds1-2ubuntu1, 1.1.12+ds1-2ubuntu1.1, 1.1.12+ds1-2ubuntu1.2, 1.1.12+ds1-2ubuntu1.3, 1.1.12-0ubuntu1, 1.1.12-0ubuntu2, 1.1.12-0ubuntu2~20.04.1, 1.1.12-0ubuntu2~22.04.1, 1.1.12-0ubuntu3, 1.1.12-0ubuntu3.1, 1.1.15+ds1-2ubuntu1, 1.1.4-0ubuntu1~18.04.1, 1.1.4-0ubuntu1~18.04.2, 1.1.4-0ubuntu1~18.04.2+esm1, 1.1.4-0ubuntu1~20.04.1, 1.1.4-0ubuntu1~20.04.2, 1.1.4-0ubuntu1~20.04.3, 1.1.4-0ubuntu1~22.04.1, 1.1.4-0ubuntu1~22.04.2, 1.1.4-0ubuntu1~22.04.3, 1.1.7-0ubuntu1~20.04.1, 1.1.7-0ubuntu1~20.04.2, 1.1.7-0ubuntu1~20.04.4, 1.1.7-0ubuntu1~20.04.5, 1.1.7-0ubuntu1~22.04.1, 1.1.7-0ubuntu1~22.04.2, 1.1.7-0ubuntu1~22.04.4, 1.1.7-0ubuntu1~22.04.5, 1.1.7-0ubuntu1~22.04.6, 1.1.7-0ubuntu2, 1.2.5-0ubuntu1, 1.2.5-0ubuntu1~22.04.1, 1.2.5-0ubuntu1~24.04.1, 1.3.0-0ubuntu1, 1.3.0-0ubuntu2, 1.3.0-0ubuntu2~22.04.1, 1.3.0-0ubuntu2~24.04.1, 1.3.3+ds1-2ubuntu1, 1.3.3-0ubuntu1, 1.3.3-0ubuntu1~22.04.2, 1.3.3-0ubuntu1~22.04.3, 1.3.3-0ubuntu1~24.04.2, 1.3.3-0ubuntu1~24.04.3, 1.3.3-0ubuntu1~25.10.2, 1.3.3-0ubuntu1~25.10.3, 1.3.3-0ubuntu2, 1.3.4-0ubuntu1, 1.3.4-0ubuntu1~22.04.1, 1.3.4-0ubuntu1~24.04.1, 1.3.4-0ubuntu1~25.10.1, 1.3.5+ds1-1ubuntu1, 1.3.6+ds1-1ubuntu1, 1.4.0-0ubuntu1, 1.5.1-0ubuntu1, 1.5.1-0ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-41579
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:11 UTC · Revision 1
Source evidence
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.
osv:UBUNTU-CVE-2026-41579
runc
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc-stable
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc-stable
Fixed versions: Not specified
runc
Fixed versions: Not specified
runc-app
Fixed versions: Not specified
runc-stable
Fixed versions: Not specified
Complete source record
{
"id": "dbd7ad8e062309d159ae6bc6bf2e0a08c1fdf676887573a3c086b24849d3c03d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-41579",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-41579",
"summary": "runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.",
"evidence": "osv:UBUNTU-CVE-2026-41579",
"products": [
{
"name": {
"value": "runc",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "0.0.8+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.1.1-0ubuntu5~16.04",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~rc1-0ubuntu1~16.04",
"evidence": "/affected/0/versions"
},
{
"value": "1.0.0~rc1-0ubuntu2~16.04.1",
"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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"evidence": "/affected/0/versions"
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{
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},
{
"value": "1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2",
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{
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{
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{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1",
"evidence": "/affected/0/versions"
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{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2",
"evidence": "/affected/0/versions"
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{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4",
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{
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{
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{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
"value": "1.0.0~rc4+dfsg1-6ubuntu0.18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc10-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc10-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc93-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc93-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc95-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.0~rc95-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.0.1-0ubuntu2~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.0-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.4-0ubuntu1~18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.4-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.1.4-0ubuntu1~18.04.2+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "runc",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.0~rc8+git20190923.3e425f80-0ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0~rc10-0ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0~rc93-0ubuntu1~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0~rc93-0ubuntu1~20.04.2",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0~rc95-0ubuntu1~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.0~rc95-0ubuntu1~20.04.2",
"evidence": "/affected/2/versions"
},
{
"value": "1.0.1-0ubuntu2~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.0-0ubuntu1~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.0-0ubuntu1~20.04.2",
"evidence": "/affected/2/versions"
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{
"value": "1.1.4-0ubuntu1~20.04.1",
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{
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{
"value": "1.1.4-0ubuntu1~20.04.3",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.7-0ubuntu1~20.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.7-0ubuntu1~20.04.2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.7-0ubuntu1~20.04.4",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.7-0ubuntu1~20.04.5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "runc-app",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.12-0ubuntu2~20.04.1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "runc",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.0.1-0ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "1.0.1-0ubuntu3",
"evidence": "/affected/4/versions"
},
{
"value": "1.0.3-0ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.0-0ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.0-0ubuntu1.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.4-0ubuntu1~22.04.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.4-0ubuntu1~22.04.2",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.4-0ubuntu1~22.04.3",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.7-0ubuntu1~22.04.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.7-0ubuntu1~22.04.2",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.7-0ubuntu1~22.04.4",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.7-0ubuntu1~22.04.5",
"evidence": "/affected/4/versions"
},
{
"value": "1.1.7-0ubuntu1~22.04.6",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "runc-app",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.12-0ubuntu2~22.04.1",
"evidence": "/affected/5/versions"
},
{
"value": "1.2.5-0ubuntu1~22.04.1",
"evidence": "/affected/5/versions"
},
{
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},
{
"value": "1.3.3-0ubuntu1~22.04.2",
"evidence": "/affected/5/versions"
},
{
"value": "1.3.3-0ubuntu1~22.04.3",
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},
{
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}
]
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.7-0ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.10+ds1-1ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.10+ds1-1ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.12+ds1-1ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.12+ds1-2ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.12+ds1-2ubuntu1.1",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.12+ds1-2ubuntu1.2",
"evidence": "/affected/6/versions"
},
{
"value": "1.1.12+ds1-2ubuntu1.3",
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}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.10-0ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "1.1.12-0ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "1.1.12-0ubuntu2",
"evidence": "/affected/7/versions"
},
{
"value": "1.1.12-0ubuntu3",
"evidence": "/affected/7/versions"
},
{
"value": "1.1.12-0ubuntu3.1",
"evidence": "/affected/7/versions"
},
{
"value": "1.2.5-0ubuntu1~24.04.1",
"evidence": "/affected/7/versions"
},
{
"value": "1.3.0-0ubuntu2~24.04.1",
"evidence": "/affected/7/versions"
},
{
"value": "1.3.3-0ubuntu1~24.04.2",
"evidence": "/affected/7/versions"
},
{
"value": "1.3.3-0ubuntu1~24.04.3",
"evidence": "/affected/7/versions"
},
{
"value": "1.3.4-0ubuntu1~24.04.1",
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}
]
},
{
"name": {
"value": "runc",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.15+ds1-2ubuntu1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "runc-app",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.5-0ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.3.0-0ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.3.0-0ubuntu2",
"evidence": "/affected/9/versions"
},
{
"value": "1.3.3-0ubuntu1~25.10.2",
"evidence": "/affected/9/versions"
},
{
"value": "1.3.3-0ubuntu1~25.10.3",
"evidence": "/affected/9/versions"
},
{
"value": "1.3.4-0ubuntu1~25.10.1",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "runc-stable",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.0-0ubuntu1",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.3-0ubuntu1~25.10.2",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.3-0ubuntu1~25.10.3",
"evidence": "/affected/10/versions"
},
{
"value": "1.3.4-0ubuntu1~25.10.1",
"evidence": "/affected/10/versions"
}
]
},
{
"name": {
"value": "runc",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.3+ds1-2ubuntu1",
"evidence": "/affected/11/versions"
},
{
"value": "1.3.5+ds1-1ubuntu1",
"evidence": "/affected/11/versions"
},
{
"value": "1.3.6+ds1-1ubuntu1",
"evidence": "/affected/11/versions"
}
]
},
{
"name": {
"value": "runc-app",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.0-0ubuntu1",
"evidence": "/affected/12/versions"
},
{
"value": "1.5.1-0ubuntu1",
"evidence": "/affected/12/versions"
},
{
"value": "1.5.1-0ubuntu2",
"evidence": "/affected/12/versions"
}
]
},
{
"name": {
"value": "runc-stable",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.3.4-0ubuntu1",
"evidence": "/affected/13/versions"
},
{
"value": "1.5.1-0ubuntu1",
"evidence": "/affected/13/versions"
},
{
"value": "1.5.1-0ubuntu2",
"evidence": "/affected/13/versions"
}
]
},
{
"name": {
"value": "runc",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [],
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"https://www.openwall.com/lists/oss-security/2026/06/13/2",
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"published_at": "2026-07-01T02:17:00+00:00"
}