CVE-2026-6475
HIGH 1 PoC
MEDIUM
Priority: 0.04
BB Relevance:
78/100
Published: 2026-05-14
Modified: 2026-11-11
First seen: 2026-11-11
Status: active
Attack Surface
Network
Low Complexity
No Auth
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
High
I:
High
A:
High
Description
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.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| postgresql | postgresql | < 14.23 |
References & Advisories (1)
Patch
Vendor Advisory