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CVE-2026-16239— PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code

CVSS 8.8 · High

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-16239

Vulnerability Information
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Vulnerability Title
PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code
Source: CVE Program / CVE List V5
Vulnerability Description
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 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
-PostgreSQL 18 ~ 18.5 -

II. Public POCs for CVE-2026-16239

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III. Intelligence Information for CVE-2026-16239

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Vendor Advisories for CVE-2026-16239 (1)

Same Patch Batch · n/a · 2026-08-13 · 31 CVEs total

CVE-2026-146768.8 HIGHPostgreSQL pg_stat_statements heap buffer overflow executes arbitrary code
CVE-2026-146778.8 HIGHPostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound
CVE-2026-146718.8 HIGHPostgreSQL refint plan cache type confusion executes arbitrary code
CVE-2026-146808.8 HIGHPostgreSQL type confusion via "internal" arguments
CVE-2026-146698.8 HIGHPostgreSQL to_char heap buffer overflow executes arbitrary code
CVE-2026-157418.8 HIGHPostgreSQL expression deparse allows SQL injection via EXTRACT argument
CVE-2026-162388.8 HIGHPostgreSQL type confusion in pg_restore_attribute_stats() executes arbitrary code
CVE-2026-157428.8 HIGHPostgreSQL fuzzystrmatch writes effectively-arbitrary addresses, via integer wraparound
CVE-2026-146648.8 HIGHPostgreSQL regexp heap buffer overflow executes arbitrary code
CVE-2026-193858.8 HIGHPostgreSQL pg_dump heap buffer overflow executes arbitrary code
CVE-2026-184088.8 HIGHPostgreSQL psql \unrestrict lets superuser of pg_dump origin server execute arbitrary code
CVE-2026-146628.8 HIGHPostgreSQL tsvector and tsquery undersize allocations, via integer wraparound
CVE-2026-146708.8 HIGHPostgreSQL plperl tied object heap buffer overflow executes arbitrary code
CVE-2026-146798.2 HIGHPostgreSQL stack buffer overflow in argument match writes 0x0 and 0x1 to server memory
CVE-2026-146688.1 HIGHPostgreSQL ctid type confusion in selectivity estimator discloses derivative of arbitrary
CVE-2026-64648.1 HIGHPostgreSQL psql COPY FROM STDIN early failure processes data lines as psql commands
CVE-2026-64717.2 HIGHPostgreSQL logical decoding can dlopen arbitrary file
CVE-2026-146636.5 MEDIUMPostgreSQL pgcrypto, for OpenSSL-disabled ciphers, silently encrypts to and decrypts from
CVE-2026-146725.3 MEDIUMPostgreSQL observable response discrepancy with non-default scram_iterations provides user
CVE-2026-146784.3 MEDIUMPostgreSQL pg_trgm picksplit reads past end of buffer

Showing top 20 of 31 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: PostgreSQL
Same vendor: n/a
Same weakness: CWE-843

V. Comments for CVE-2026-16239

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