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PostgreSQL Client Software Can Leak Sensitive Data
OESA-2026-1493
Summary
Certain versions of the PostgreSQL client software contain security flaws that could allow a malicious user to access sensitive data or execute unauthorized code on your system. This affects users of PostgreSQL 14.21 and earlier versions. To protect your system, update to the latest version of the client software, specifically version 18.2 or later.
What to do
- Update postgresql to version 15.17-1.oe2403.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| – | postgresql | <= 15.17-1.oe2403 | 15.17-1.oe2403 |
Original title
postgresql security update
Original description
PostgreSQL is an advanced Object-Relational database management system (DBMS).
The base postgresql package contains the client programs that you&apos;ll need to
access a PostgreSQL DBMS server, as well as HTML documentation for the whole
system. These client programs can be located on the same machine as the
PostgreSQL server, or on a remote machine that accesses a PostgreSQL server
over a network connection. The PostgreSQL server can be found in the
postgresql-server sub-package.
Security Fix(es):
Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled out viability of attacks that arrange for presence of confidential information in disclosed bytes, but they seem unlikely. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2003)
Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows an object creator to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2004)
Heap buffer overflow in PostgreSQL pgcrypto allows a ciphertext provider to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2005)
Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2006)
The base postgresql package contains the client programs that you&apos;ll need to
access a PostgreSQL DBMS server, as well as HTML documentation for the whole
system. These client programs can be located on the same machine as the
PostgreSQL server, or on a remote machine that accesses a PostgreSQL server
over a network connection. The PostgreSQL server can be found in the
postgresql-server sub-package.
Security Fix(es):
Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled out viability of attacks that arrange for presence of confidential information in disclosed bytes, but they seem unlikely. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2003)
Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows an object creator to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2004)
Heap buffer overflow in PostgreSQL pgcrypto allows a ciphertext provider to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2005)
Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.(CVE-2026-2006)
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-2003 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-2004 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-2005 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-2006 Vendor Advisory
Published: 6 Mar 2026 · Updated: 6 Mar 2026 · First seen: 6 Mar 2026