PostgreSQL to_char heap buffer overflow executes arbitrary code (CVE-2026-14669)
A heap buffer overflow vulnerability exists in PostgreSQL's to_char function for timestamptz data types. This flaw allows an attacker who controls the timezone input to execute arbitrary code with the privileges of the database operating system user by providing a long POSIX timezone abbreviation. Multiple PostgreSQL versions prior to 14.24, 15.19, 16.15, 17.11, and 18.5 are affected. A patch is available to address this issue.
AI Analysis
Technical Summary
CVE-2026-14669 is a heap buffer overflow vulnerability in the PostgreSQL to_char(timestamptz) function. The vulnerability arises when the timezone is chosen by an attacker who can supply a long POSIX timezone abbreviation, leading to arbitrary code execution as the OS user running the database. Affected versions include PostgreSQL releases before 14.24, 15.19, 16.15, 17.11, and 18.5. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow). A patch is available to remediate this issue.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code on the operating system with the privileges of the database user. This could lead to full compromise of the database server environment depending on the privileges of the database OS user.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade to PostgreSQL versions 14.24, 15.19, 16.15, 17.11, 18.5 or later to remediate the issue. No additional mitigation steps are indicated beyond applying the official fix.
PostgreSQL to_char heap buffer overflow executes arbitrary code (CVE-2026-14669)
Description
A heap buffer overflow vulnerability exists in PostgreSQL's to_char function for timestamptz data types. This flaw allows an attacker who controls the timezone input to execute arbitrary code with the privileges of the database operating system user by providing a long POSIX timezone abbreviation. Multiple PostgreSQL versions prior to 14.24, 15.19, 16.15, 17.11, and 18.5 are affected. A patch is available to address this issue.
Affected software
pkg:deb/postgresql/postgresqlpkg:github/postgresql/postgresqlRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-14669 is a heap buffer overflow vulnerability in the PostgreSQL to_char(timestamptz) function. The vulnerability arises when the timezone is chosen by an attacker who can supply a long POSIX timezone abbreviation, leading to arbitrary code execution as the OS user running the database. Affected versions include PostgreSQL releases before 14.24, 15.19, 16.15, 17.11, and 18.5. The vulnerability is classified under CWE-122 (Heap-based Buffer Overflow). A patch is available to remediate this issue.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code on the operating system with the privileges of the database user. This could lead to full compromise of the database server environment depending on the privileges of the database OS user.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade to PostgreSQL versions 14.24, 15.19, 16.15, 17.11, 18.5 or later to remediate the issue. No additional mitigation steps are indicated beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-v5vg-62mg-4ccv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-14669"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7e0366bf8831d5398f8689
Added to database: 08/13/2026, 17:48:22 UTC
Last enriched: 09/08/2026, 15:15:39 UTC
Last updated: 09/28/2026, 13:47:42 UTC
Views: 69
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