Vulnerability from bitnami_vulndb
Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "postgresql",
"purl": "pkg:bitnami/postgresql"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "14.23.0"
},
{
"introduced": "15.0.0"
},
{
"fixed": "15.18.0"
},
{
"introduced": "16.0.0"
},
{
"fixed": "16.14.0"
},
{
"introduced": "17.0.0"
},
{
"fixed": "17.10.0"
},
{
"introduced": "18.0.0"
},
{
"fixed": "18.4.0"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2026-6475"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*"
],
"severity": "High"
},
"details": "Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.",
"id": "BIT-postgresql-2026-6475",
"modified": "2026-09-08T08:34:36.952Z",
"published": "2026-05-18T05:53:02.016Z",
"references": [
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6475"
},
{
"type": "ADVISORY",
"url": "https://www.postgresql.org/support/security/CVE-2026-6475/"
}
],
"schema_version": "1.6.2",
"summary": "PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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