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CVE-2026-14681— PostgreSQL improper enforcement of GSSAPI encryption when coupled with SSL

Quick assessment

Affected
n/a PostgreSQL
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PostgreSQL是PostgreSQL组织开源的一套自由的对象关系型数据库管理系统。该系统支持大部分SQL标准并且提供了许多其他特性,例如外键、触发器、视图等。 PostgreSQL 18.5之前版本和PostgreSQL 17.11之前版本存在加密问题漏洞，该漏洞源于GSSAPI对消息完整性执行不当，可能允许用户通过初始直接TLS连接违反pg_hba.conf规则协商GSSAPI，导致连接仅使用TLS加密交换数据，若TLS设置比GSS设置更宽松，连接可能继续使用较弱的保护。

CVSS 4.2 · Medium EPSS 0.07% · P0

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
n/a PostgreSQL 18< 18.6 affected
17< 17.11 affected
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I. Basic Information for CVE-2026-14681

Vulnerability Information
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Vulnerability Title
PostgreSQL improper enforcement of GSSAPI encryption when coupled with SSL
Source: CVE Program / CVE List V5
Vulnerability Description
Improper enforcement of message integrity in PostgreSQL GSSAPI support allows a user to negotiate GSSAPI contrary to pg_hba.conf rules, via initial direct TLS connection. Despite a pg_hba.conf that appears to require GSSAPI, the connection may exchange data over TLS encryption alone. If the TLS settings are more permissive than the GSS settings, the connection may continue with lesser protection. Within major versions 17-18, minor versions before PostgreSQL 18.6 and 17.11 are affected. Versions before PostgreSQL 17 are unaffected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通信信道中传输过程中消息完整性的不正确执行
Source: CVE Program / CVE List V5
Vulnerability Title
PostgreSQL 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PostgreSQL是PostgreSQL组织开源的一套自由的对象关系型数据库管理系统。该系统支持大部分SQL标准并且提供了许多其他特性,例如外键、触发器、视图等。 PostgreSQL 18.5之前版本和PostgreSQL 17.11之前版本存在加密问题漏洞，该漏洞源于GSSAPI对消息完整性执行不当，可能允许用户通过初始直接TLS连接违反pg_hba.conf规则协商GSSAPI，导致连接仅使用TLS加密交换数据，若TLS设置比GSS设置更宽松，连接可能继续使用较弱的保护。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- PostgreSQL 18 ~ 18.6 -

II. Public POCs for CVE-2026-14681

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III. Intelligence Information for CVE-2026-14681

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Vendor Advisories for CVE-2026-14681 (1)

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

CVE-2026-14671 8.8 HIGH PostgreSQL refint plan cache type confusion executes arbitrary code
CVE-2026-18408 8.8 HIGH PostgreSQL psql \unrestrict lets superuser of pg_dump origin server execute arbitrary code
CVE-2026-16239 8.8 HIGH PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code
CVE-2026-16238 8.8 HIGH PostgreSQL type confusion in pg_restore_attribute_stats() executes arbitrary code
CVE-2026-15742 8.8 HIGH PostgreSQL fuzzystrmatch writes effectively-arbitrary addresses, via integer wraparound
CVE-2026-15741 8.8 HIGH PostgreSQL expression deparse allows SQL injection via EXTRACT argument
CVE-2026-14680 8.8 HIGH PostgreSQL type confusion via "internal" arguments
CVE-2026-19385 8.8 HIGH PostgreSQL pg_dump heap buffer overflow executes arbitrary code
CVE-2026-14677 8.8 HIGH PostgreSQL 32-bit pltcl and plperl undersize allocations, via integer wraparound
CVE-2026-14676 8.8 HIGH PostgreSQL pg_stat_statements heap buffer overflow executes arbitrary code
CVE-2026-14670 8.8 HIGH PostgreSQL plperl tied object heap buffer overflow executes arbitrary code
CVE-2026-14669 8.8 HIGH PostgreSQL to_char heap buffer overflow executes arbitrary code
CVE-2026-14664 8.8 HIGH PostgreSQL regexp heap buffer overflow executes arbitrary code
CVE-2026-14662 8.8 HIGH PostgreSQL tsvector and tsquery undersize allocations, via integer wraparound
CVE-2026-14679 8.2 HIGH PostgreSQL stack buffer overflow in argument match writes 0x0 and 0x1 to server memory
CVE-2026-6464 8.1 HIGH PostgreSQL psql COPY FROM STDIN early failure processes data lines as psql commands
CVE-2026-14668 8.1 HIGH PostgreSQL ctid type confusion in selectivity estimator discloses derivative of arbitrary
CVE-2026-6471 7.2 HIGH PostgreSQL logical decoding can dlopen arbitrary file
CVE-2026-14663 6.5 MEDIUM PostgreSQL pgcrypto, for OpenSSL-disabled ciphers, silently encrypts to and decrypts from
CVE-2026-14672 5.3 MEDIUM PostgreSQL observable response discrepancy with non-default scram_iterations provides user

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

IV. Related Vulnerabilities

Same product: PostgreSQL
Same vendor: n/a
Same weakness: CWE-924

V. Comments for CVE-2026-14681

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