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CVE-2026-14662

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 system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6478

PostgreSQL discloses MD5-hashed passwords via covert timing channel

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6477

PostgreSQL libpq lo_* functions let server superuser overwrite client stack memory

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6473

PostgreSQL server undersizes allocations, via integer wraparound

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 8.8 High EPSS 1.0% KEV · Not listed
Vendors
Postgresql Redhat
Products
Postgresql Hummingbird
CVE-2026-54291

Silent channel-binding authentication downgrade via unsupported certificate algorithms

pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection can trigger the downgrade with a certificate whose signature algorithm has no tls-server-end-point channel-binding hash, because the bundled com.ongres.scram:scram-client returns an empty byte array instead of failing and pgJDBC ScramAuthenticator checks only that the server advertised a PLUS mechanism, without rejecting the empty binding or checking that the negotiated mechanism uses channel binding. This issue is fixed in version 42.7.12.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Pgjdbc Postgresql
Products
Pgjdbc Postgresql Jdbc Driver
CVE-2026-6637

PostgreSQL refint allows stack buffer overflow and SQL injection

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6575

PostgreSQL pg_restore_attribute_stats accepts values that cause query planning to read past end of stats array

Buffer over-read in PostgreSQL function pg_restore_attribute_stats() accepts array values of unmatched length, which causes query planning to read past end of one array. This allows a table maintainer to infer memory values past that array end. Within major version 18, minor versions before PostgreSQL 18.4 are affected. Versions before PostgreSQL 18 are unaffected.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6479

PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
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 PostgreSQL 18.4 and 17.10 are affected. Versions before PostgreSQL 17 are unaffected.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6475

PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6474

PostgreSQL timeofday() can disclose portions of server memory

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6472

PostgreSQL CREATE TYPE does not check multirange schema CREATE privilege

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2026-6638

PostgreSQL REFRESH PUBLICATION allows SQL injection via table name

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2007-0555

security flaw

PostgreSQL 7.3 before 7.3.13, 7.4 before 7.4.16, 8.0 before 8.0.11, 8.1 before 8.1.7, and 8.2 before 8.2.2 allows attackers to disable certain checks for the data types of SQL function arguments, which allows remote authenticated users to cause a denial of service (server crash) and possibly access database content.

CVSS 2.0 · 8.5 High EPSS 5.0% KEV · Not listed
Vendors
Postgresql Redhat
Products
Postgresql Enterprise Linux Rhel Application Stack
CVE-2006-5542

New version fixes three different crash vulnerabilities

backend/tcop/postgres.c in PostgreSQL 8.1.x before 8.1.5 allows remote authenticated users to cause a denial of service (daemon crash) related to duration logging of V3-protocol Execute messages for (1) COMMIT and (2) ROLLBACK SQL statements.

CVSS 2.0 · 4.0 Medium EPSS 2.0% KEV · Not listed
Vendors
Postgresql Redhat
Products
Postgresql Enterprise Linux Rhel Application Stack
CVE-2006-5540

security flaw

backend/parser/analyze.c in PostgreSQL 8.1.x before 8.1.5 allows remote authenticated users to cause a denial of service (daemon crash) via certain aggregate functions in an UPDATE statement, which are not properly handled during a "MIN/MAX index optimization."

CVSS 2.0 · 4.0 Medium EPSS 2.0% KEV · Not listed
Vendors
Postgresql Redhat
Products
Postgresql Enterprise Linux Rhel Application Stack
CVE-2009-4136

postgresql: SQL privilege escalation via modifications to session-local state

PostgreSQL 7.4.x before 7.4.27, 8.0.x before 8.0.23, 8.1.x before 8.1.19, 8.2.x before 8.2.15, 8.3.x before 8.3.9, and 8.4.x before 8.4.2 does not properly manage session-local state during execution of an index function by a database superuser, which allows remote authenticated users to gain privileges via a table with crafted index functions, as demonstrated by functions that modify (1) search_path or (2) a prepared statement, a related issue to CVE-2007-6600 and CVE-2009-3230.

CVSS 2.0 · 6.5 Medium EPSS 3.6% KEV · Not listed
Vendors
Postgresql Redhat
Products
Postgresql Enterprise Linux
CVE-2009-4034

postgresql: incorrect verification of SSL certificates with NUL in name

PostgreSQL 7.4.x before 7.4.27, 8.0.x before 8.0.23, 8.1.x before 8.1.19, 8.2.x before 8.2.15, 8.3.x before 8.3.9, and 8.4.x before 8.4.2 does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based PostgreSQL servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended client-hostname restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

CVSS 2.0 · 5.8 Medium EPSS 2.1% KEV · Not listed
Vendors
Postgresql
Products
Postgresql
CVE-2009-3231

postgresql: LDAP authentication bypass when anonymous LDAP bind are allowed

The core server component in PostgreSQL 8.3 before 8.3.8 and 8.2 before 8.2.14, when using LDAP authentication with anonymous binds, allows remote attackers to bypass authentication via an empty password.

CVSS 2.0 · 6.8 Medium EPSS 7.6% KEV · Not listed
Vendors
Canonical Fedoraproject Opensuse and 2 more
Products
Ubuntu Linux Fedora Opensuse and 3 more