CVE-2026-16240 - PostgreSQL pg_basebackup can use backup manifest content as a format string

CVE-2026-16240 - PostgreSQL pg_basebackup can use backup manifest content as a format string

https://cvefeed.io/rssfeed/latest.atom / Thu, 11/12/2026 - 17:08
CVE ID :CVE-2026-16240
Published : Nov. 12, 2026, 2:15 p.m. | 39 minutes ago
Description :Use of externally-controlled format string in PostgreSQL pg_basebackup allows an attacker having already compromised a server to achieve disclosure from pg_basebackup memory, via backup manifest bytes. The vulnerability does not return the improperly-read bytes back to the attacker's server, so a successful attack would need separate implementation-specific secrets for that. Integrity impact is unlikely; in particular, the applicable formatter does not support %n. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.
Severity: 3.7 | LOW
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