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CVE-2026-14661VulnerabilityPublished

PostgreSQL dblink · External Control of File Name

Source GCVE Database

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Authoritative record:CVE-2026-14661· High 8.1

Not known to be exploited · CVSS 8.1 High · fixed in 18.7 : patch PostgreSQL soon.

Data as of 12 Nov 2026, 16:20 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (PostgreSQL)CVSS 3.18.1
Patch
Available – fixed in 18.7, 17.12, 16.16 +2
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
PostgreSQLAffected
  • >=18 <18.7
Fixed in
  • 18.7
PostgreSQLAffected
  • >=17 <17.12
Fixed in
  • 17.12
PostgreSQLAffected
  • >=16 <16.16
Fixed in
  • 16.16
PostgreSQLAffected
  • >=15 <15.20
Fixed in
  • 15.20
PostgreSQLAffected
  • <14.25
Fixed in
  • 14.25
Postgresqlpostgresql/postgresqlpkg:deb/postgresql/postgresqlOther threatsAffected
  • >=18 <18.7
  • >=17 <17.12
  • >=16 <16.16
  • >=15 <15.20
  • <14.25
Fixed in
  • 18.7
  • 17.12
  • 16.16
  • 15.20
  • 14.25

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, avoid using the "sslkeylogfile" parameter in untrusted contexts or restrict access to features that allow specifying this parameter.

Description

A vulnerability in PostgreSQL involving external control of file names in the dblink and CREATE/ALTER SUBSCRIPTION features allows a user to cause persistent denial of service by appending invalid data to a chosen file. This occurs through the "sslkeylogfile" connection parameter, which appends data in NSS keylog format to a user-specified file but cannot add arbitrary bytes. The issue affects PostgreSQL major version 18 before minor version 18.7, and versions before 18 if libpq version 18 or later is used by the server.

References

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