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CVE-2026-14673— PostgreSQL amcheck does not clear untrusted search path

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版本之前的18.x版本、16.15版本之前的16.x版本、15.19版本之前的15.x版本和14.24版本之前的14.x版本存在权限许可和访问控制问题漏洞，该漏洞源于不受信任的搜索路径，可能导致拥有amcheck函数EXECUTE权限的攻击者通过设置恶意搜索路径，以表达式索引所有者的身份执行任意函数。

CVSS 3.8 · Low EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1504

Affected Version Matrix 4

VendorProduct Version RangeStatus
n/a PostgreSQL 18< 18.6 affected
16< 16.15 affected
15< 15.19 affected
< 14.24 affected
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I. Basic Information for CVE-2026-14673

Vulnerability Information
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Vulnerability Title
PostgreSQL amcheck does not clear untrusted search path
Source: CVE Program / CVE List V5
Vulnerability Description
Untrusted search path in PostgreSQL amcheck allows a grantee of amcheck function EXECUTE privilege to execute arbitrary functions as the owners of expression indexes that depend on the search path, via setting a hostile search path before calling the amcheck function. Within major versions 18, 16, 15, and 14, minor versions before PostgreSQL 18.6, 16.15, 15.19, and 14.24 are affected. PostgreSQL 17 is unaffected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不可信的搜索路径
Source: CVE Program / CVE List V5
Vulnerability Title
PostgreSQL 权限许可和访问控制问题漏洞
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版本之前的18.x版本、16.15版本之前的16.x版本、15.19版本之前的15.x版本和14.24版本之前的14.x版本存在权限许可和访问控制问题漏洞，该漏洞源于不受信任的搜索路径，可能导致拥有amcheck函数EXECUTE权限的攻击者通过设置恶意搜索路径，以表达式索引所有者的身份执行任意函数。
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-2026-14673

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III. Intelligence Information for CVE-2026-14673

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Vendor Advisories for CVE-2026-14673 (1)

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

CVE-2026-14680 8.8 HIGH PostgreSQL type confusion via "internal" arguments
CVE-2026-14671 8.8 HIGH PostgreSQL refint plan cache type confusion executes arbitrary code
CVE-2026-19385 8.8 HIGH PostgreSQL pg_dump heap buffer overflow 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-2026-14677 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-2026-14662 8.8 HIGH PostgreSQL tsvector and tsquery undersize allocations, via integer wraparound
CVE-2026-14664 8.8 HIGH PostgreSQL regexp heap buffer overflow executes arbitrary code
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-426

V. Comments for CVE-2026-14673

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