Is there a public exploit for CVE-2026-16240?

No public exploit for CVE-2026-16240 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-16240?

CVE-2026-16240 scores CVSS 3.7 (v3.1), rated low.

What does CVE-2026-16240 affect?

CVE-2026-16240 affects n/a PostgreSQL.

3.7 Low

Use of externally-controlled format string in PostgreSQL pgbasebackup allows an attacker having already compromised a server to achieve…

CVE-2026-16240

Use of externally-controlled format string in PostgreSQL pgbasebackup allows an attacker having already compromised a server to achieve disclosure from pgbasebackup 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.

Assessment

CVSS: 3.7 (v3.1)
Severity: Low
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: n/a · PostgreSQL
Assigner: PostgreSQL

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

At the source

EUVD (ENISA)

References

https://www.postgresql.org/support/security/CVE-2026-16240/

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