Red Hat Security Advisory: postgresql18 security update

Fixed packages 27

Vulnerabilities 19

• High 8.8
  CVE-2026-14662 Public exploit

  PostgreSQL tsvector and tsquery undersize allocations, via integer wraparound

  Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating s…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14664

  PostgreSQL regexp heap buffer overflow executes arbitrary code

  Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation. This shares heritage with CVE-2026-2006, but this case involved un…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14669 Public exploit

  PostgreSQL to_char heap buffer overflow executes arbitrary code

  Heap buffer overflow in PostgreSQL to_char(timestamptz) allows the party choosing the timezone to execute arbitrary code as the operating system user running the database, via a long POSIX timezone abbreviation. Versions before PostgreSQL 18.6, 17.11, 16.15, …

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14670

  PostgreSQL plperl tied object heap buffer overflow executes arbitrary code

  Heap buffer overflow in PostgreSQL plperl return of a tied hash allows the function owner to execute arbitrary code as the operating system user running the database, via a crafted function body. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14671

  PostgreSQL refint plan cache type confusion executes arbitrary code

  Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating system user running the database. The fix for this emerged as a non-security bug report, and the fix appear in the git repository with subject "re…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14676

  PostgreSQL pg_stat_statements heap buffer overflow executes arbitrary code

  Heap buffer overflow in PostgreSQL pg_stat_statements allows the query author to execute arbitrary code as the operating system user running the database, via crafted queries containing array constants. Within major version 18, minor versions before PostgreSQ…

  postgresql-9.3 postgresql15 postgresql16 postgresql17 Debian Ubuntu Alpine
  Aug 13, 2026
• High 8.8
  CVE-2026-14677

  PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound

  Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user runnin…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-14680

  PostgreSQL type confusion via "internal" arguments

  Type confusion with PostgreSQL "internal" data type arguments allows any user to execute arbitrary code as the operating system user running the database, via calls to functions with that argument type. Type "internal" represents a class of mutually-incompati…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-15741

  PostgreSQL expression deparse allows SQL injection via EXTRACT argument

  SQL injection in PostgreSQL EXTRACT() deparse allows an object owner to execute arbitrary SQL as a superuser via a hostile object definition. Attacks affect expression deparse consumers broadly, including pg_dump, psql commands like \sf, and any similar usage…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-15742

  PostgreSQL fuzzystrmatch writes effectively-arbitrary addresses, via integer wraparound

  Integer wraparound in PostgreSQL fuzzystrmatch allows a user to direct writes to a huge range of addresses, executing arbitrary code as the operating system user running the database, via extreme inputs to SQL function levenshtein() or levenshtein_less_equal(…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-16238

  PostgreSQL type confusion in pg_restore_attribute_stats() executes arbitrary code

  Type confusion in PostgreSQL pg_restore_attribute_stats() allows an object creator to execute arbitrary code as the operating system user running the database, via conflation of range and multirange values. Within major version 18, minor versions before Postg…

  postgresql-9.3 postgresql15 postgresql16 postgresql17 Debian Ubuntu Alpine
  Aug 13, 2026
• High 8.8
  CVE-2026-16239

  PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code

  Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.6, 17.11, 16.15, …

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-18408

  PostgreSQL psql \unrestrict lets superuser of pg_dump origin server execute arbitrary code in psql client

  Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \restrict meta-command in…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.8
  CVE-2026-19385

  PostgreSQL pg_dump heap buffer overflow executes arbitrary code

  Heap buffer overflow in PostgreSQL pg_dump of long function transform lists allows an object creator to execute arbitrary code as the operating system user running pg_dump, via a crafted transform list. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, an…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.2
  CVE-2026-14679

  PostgreSQL stack buffer overflow in argument match writes 0x0 and 0x1 to server memory

  Stack buffer overflow in PostgreSQL argument name matching allows an object creator to achieve unknown impacts via OUT parameter count. The attack can write only 0x0 and 0x1 bytes. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.1
  CVE-2026-14668

  PostgreSQL ctid type confusion in selectivity estimator discloses derivative of arbitrary read

  Type confusion regarding input of PostgreSQL ctid data type selectivity estimator allows an object creator to view a calculation derived from the value of an arbitrary 4-byte span of memory, via a chosen non-ctid input. While the calculation loses precision, …

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 8.1
  CVE-2026-6464

  PostgreSQL psql COPY FROM STDIN early failure processes data lines as psql commands

  Untrusted data inclusion in PostgreSQL psql COPY may allow a server administrator to elicit execution of data lines as psql commands, via error injection. If the "COPY FROM STDIN" or "\copy FROM STDIN" command fails before the server indicates that it awaits …

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 7.2
  CVE-2026-6471 Public exploit

  PostgreSQL logical decoding can dlopen arbitrary file

  Missing authorization in PostgreSQL logical decoding allows a non-superuser holding REPLICATION privilege to dlopen any file visible to the operating system account running the server, via the choice of logical decoding plugin. This in turn runs arbitrary cod…

  postgresql-9.3 postgresql15 postgresql-9.5 postgresql-10 Debian Ubuntu Azure Linux Alpine Wolfi
  Aug 13, 2026
• High 7.2
  CVE-2026-6476

  PostgreSQL pg_createsubscriber allows SQL injection via subscription name

  SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitrary SQL as a superuser. The attack takes effect when pg_createsubscriber next runs. Within major versions 17 and 18, minor versions before P…

  postgresql-9.3 postgresql-9.5 postgresql-10 postgresql-12 Debian Ubuntu Alpine
  May 14, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2477437
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515302
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515303
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515306
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515307
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515308
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515311
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515313
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515314
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515316
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515317
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515319
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515321
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515322
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515324
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515325
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515326
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515328
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515332
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67280.json
• report
  https://access.redhat.com/security/cve/CVE-2026-6464
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-6464
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-6464
• article
  https://www.postgresql.org/support/security/CVE-2026-6464/
• report
  https://access.redhat.com/security/cve/CVE-2026-6471
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-6471
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-6471
• article
  https://www.postgresql.org/support/security/CVE-2026-6471/
• report
  https://access.redhat.com/security/cve/CVE-2026-6476
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-6476
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-6476
• article
  https://www.postgresql.org/support/security/CVE-2026-6476/
• report
  https://access.redhat.com/security/cve/CVE-2026-14662
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-14662
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-14662
• article
  https://www.postgresql.org/support/security/CVE-2026-14662/
• report
  https://access.redhat.com/security/cve/CVE-2026-14664
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-14664