PostgreSQL 16.2

What's new in this version:

CVSS v3.1 Base Score: 4.3:
- Supported, Vulnerable Versions: 14 - 18
- 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
- The PostgreSQL project thanks Altan Birler for reporting this problem
- CVE-2026-2004: PostgreSQL intarray missing validation of type of input to selectivity estimator executes arbitrary cod

CVSS v3.1 Base Score: 8.8:
- Supported, Vulnerable Versions: 14 - 18
- 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
- The PostgreSQL project thanks Daniel Firer, as part of zeroday.cloud, for reporting this problem
- CVE-2026-2005: PostgreSQL pgcrypto heap buffer overflow executes arbitrary cod

CVSS v3.1 Base Score: 8.8:
- Supported, Vulnerable Versions: 14 - 18
- 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
- The PostgreSQL project thanks Team Xint Code, as part of zeroday.cloud, for reporting this problem
- CVE-2026-2006: PostgreSQL missing validation of multibyte character length executes arbitrary cod

CVSS v3.1 Base Score: 8.8:
- Supported, Vulnerable Versions: 14 - 18
- 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
- The PostgreSQL project thanks Paul Gerste and Moritz Sanft, as part of zeroday.cloud, for reporting this problem
- CVE-2026-2007: PostgreSQL pg_trgm heap buffer overflow writes pattern onto server memor

CVSS v3.1 Base Score: 8.2:
- Supported, Vulnerable Versions: 18
- Heap buffer overflow in PostgreSQL pg_trgm allows a database user to achieve unknown impacts via a crafted input string. The attacker has limited control over the byte patterns to be written, but we have not ruled out the viability of attacks that lead to privilege escalation. PostgreSQL 18.1 and 18.0 are affected
- The PostgreSQL project thanks Heikki Linnakangas for reporting this problem

Bug Fixes and Improvements:
- This update fixes over 65 bugs that were reported in the last several months. The issues listed below affect PostgreSQL 18. Some of these issues may also affect other supported versions of PostgreSQL
- Fix inconsistent case-insensitive text matching in the ltree extension. If you use an index on an ltree column, in some cases you may need perform a reindex. See the "Updating" section for additional instructions
- Executing ALTER TABLE ... ADD CONSTRAINT to add a NOT NULL constraint on a column that already is marked as NOT NULL now requires the constraint name to match the existing constraint name
- Fix trigger behavior when MERGE is executed from a WITH query to include rows affected by the MERGE
- Several query planner fixes
- Fix for text substring search for non-deterministic collations
- Several fixes for NOTIFY error handling and reporting
- Use the correct ordering function in GIN index parallel builds
- Fix incorrect handling of incremental backups with tables larger than 1GB
- Fail recovery if WAL does not exist back to the redo point indicated by the checkpoint record
- Fix for ALTER PUBLICATION to ensure event triggers contain all set options
- Several fixes around replication slot initialization
- Don't advance replication slot after a logical replication parallel worker apply failure to prevent transaction loss on the subscriber
- Fix error reporting for SQL/JSON path type mismatches
- Fix JIT compilation function inlining when using LLVM 17 or later
- Add new server parameter file_extend_method to control use of posix_fallocate()
- Fix psql tab completion for the VACUUM command options
- Fix pg_dump to handle concurrent sequence drops gracefully and to fail if the calling user explicitly lacks privileges to read the sequence
- Several fixes for amcheck around btree inspection
- Avoid crash in pg_stat_statements when an IN list contains both constants and non-constant expressions