Vulnerability from bitnami_vulndb
Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \restrict meta-command input expansion. The fix for CVE-2025-8714 introduced \restrict and \unrestrict to block this attack, but \unrestrict itself was sufficient for an attack. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-format dump. Non-core use of \restrict would be affected, but we've not identified non-core use. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "postgresql",
"purl": "pkg:bitnami/postgresql"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "14.24.0"
},
{
"introduced": "15.0.0"
},
{
"fixed": "15.19.0"
},
{
"introduced": "16.0.0"
},
{
"fixed": "16.15.0"
},
{
"introduced": "17.0.0"
},
{
"fixed": "17.11.0"
},
{
"introduced": "18.0.0"
},
{
"fixed": "18.5.0"
}
],
"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-2026-18408"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*"
],
"severity": "High"
},
"details": "Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \\restrict meta-command input expansion. The fix for CVE-2025-8714 introduced \\restrict and \\unrestrict to block this attack, but \\unrestrict itself was sufficient for an attack. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-format dump. Non-core use of \\restrict would be affected, but we\u0027ve not identified non-core use. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.",
"id": "BIT-postgresql-2026-18408",
"modified": "2026-09-08T08:34:36.952Z",
"published": "2026-08-19T08:52:54.056Z",
"references": [
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18408"
},
{
"type": "ADVISORY",
"url": "https://www.postgresql.org/support/security/CVE-2026-18408/"
}
],
"schema_version": "1.6.2",
"summary": "PostgreSQL psql \\unrestrict lets superuser of pg_dump origin server execute arbitrary code in psql client"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- 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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