CVE-2026-14661
Published:November 12, 2026
Updated:November 12, 2026
External control of file name in PostgreSQL dblink and CREATE/ALTER SUBSCRIPTION allows a user to achieve persistent denial of service, via appending invalid data to a chosen file. Specifically, the "sslkeylogfile" connection parameter appends data, in NSS keylog format, to a file of the user's choosing. This "sslkeylogfile" mechanism cannot add arbitrary bytes. Within major version 18, minor versions before PostgreSQL 18.7 are affected. Versions before PostgreSQL 18 are also affected if libpq version 18 or later is installed and in use by the server.
Affected Packages
https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL8_2_BETA1 <REL_14_25 || >=REL8_3_BETA1 <REL_14_25 || >=REL8_4_BETA1 <REL_14_25 || >=REL9_0_ALPHA4 <REL_14_25 || >=REL9_1_ALPHA1 <REL_14_25 || >=REL9_2_BETA1 <REL_14_25 || >=REL9_3_BETA1 <REL_14_25 || >=REL9_4_BETA1 <REL_14_25 || >=REL9_5_ALPHA1 <REL_14_25 || >=REL9_6_BETA1 <REL_14_25 || >=REL_10_BETA1 <REL_14_25 || >=REL_11_BETA1 <REL_14_25 || >=REL_12_BETA1 <REL_14_25 || >=REL_13_BETA1 <REL_14_25 || >=REL_14_BETA1 <REL_14_25Fix Suggestion:
Update to version REL_14_25https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_18_BETA1 <REL_18_7Fix Suggestion:
Update to version REL_18_7https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_15_BETA1 <REL_15_20Fix Suggestion:
Update to version REL_15_20https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_17_BETA1 <REL_17_12Fix Suggestion:
Update to version REL_17_12https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_16_BETA1 <REL_16_16Fix Suggestion:
Update to version REL_16_16Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
External Control of File Name or Path