CVE-2026-116323— PostgreSQL pltcl reentrant result conversion use-after-free executes arbitrary code
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 的 pltcl 模块中存在“释放后使用”（Use-after-free）漏洞。攻击者（即对象创建者）可通过定义一个域（domain）的 CHECK 约束，该约束会重新进入 Tcl 解释器并释放或修改仍被外层结果转换逻辑使用的字符串，从而以运行数据库的操作系统用户身份执行任意代码。受影响的版本包括：PostgreSQL 18.7 之前、17.12 之前、16.16 之前、15.20 之前以及 14.25 之前的所有版本。
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I. Basic Information for CVE-2026-116323
Vulnerability Information
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Vulnerability Title
PostgreSQL pltcl reentrant result conversion use-after-free executes arbitrary code
Source: CVE Program / CVE List V5
Vulnerability Description
Use after free in PostgreSQL pltcl allows an object creator to execute arbitrary code as the operating system user running the database, via a domain CHECK that re-enters the Tcl interpreter and frees or changes a string still used by the outer result conversion. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 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
释放后使用
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | PostgreSQL | 18 ~ 18.7 | - |
|
II. Public POCs for CVE-2026-116323
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-116323 (1)
Same Patch Batch · n/a · 2026-11-12 · 56 CVEs total
| CVE-2026-116332 | 8.8 HIGH | PostgreSQL portal setup use-after-free executes arbitrary code |
| CVE-2026-116304 | 8.8 HIGH | PostgreSQL parallel RECORD typmod use-after-free executes arbitrary code |
| CVE-2026-116307 | 8.8 HIGH | PostgreSQL plperl prepared-query use-after-free executes arbitrary code |
| CVE-2026-116309 | 8.8 HIGH | PostgreSQL plperl blessed-reference type confusion may execute arbitrary code |
| CVE-2026-120144 | 8.8 HIGH | PostgreSQL type-cache invalidation gap executes arbitrary code |
| CVE-2026-120142 | 8.8 HIGH | PostgreSQL dropped-column type confusion executes arbitrary code |
| CVE-2026-120141 | 8.8 HIGH | PostgreSQL materialized set-returning function type confusion executes arbitrary code |
| CVE-2026-120139 | 8.8 HIGH | PostgreSQL tuple-size integer wraparound executes arbitrary code |
| CVE-2026-116336 | 8.8 HIGH | PostgreSQL REINDEX CONCURRENTLY does not block DROP INDEX during index functions |
| CVE-2026-116335 | 8.8 HIGH | PostgreSQL commutator or negator result-type confusion executes arbitrary code |
| CVE-2026-120143 | 8.8 HIGH | PostgreSQL transition-table cursor use-after-free executes arbitrary code |
| CVE-2026-116317 | 8.8 HIGH | PostgreSQL ts_rank_cd() heap buffer overflow may execute arbitrary code |
| CVE-2026-116331 | 8.8 HIGH | PostgreSQL min/max aggregate type confusion executes arbitrary code |
| CVE-2026-116329 | 8.8 HIGH | PostgreSQL statistics import type confusion executes arbitrary code |
| CVE-2026-116330 | 8.8 HIGH | PostgreSQL pg_dump tar restore.sql fails to block psql command injection |
| CVE-2026-116328 | 8.8 HIGH | PostgreSQL generation memory context integer wraparound executes arbitrary code |
| CVE-2026-116319 | 8.8 HIGH | PostgreSQL plperl reentrant return_next() use-after-free executes arbitrary code |
| CVE-2026-116326 | 8.8 HIGH | PostgreSQL plperl tied-object exceptions follow stale sigjmp_buf |
| CVE-2026-116318 | 8.8 HIGH | PostgreSQL pg_dump not-null constraint name allows SQL injection |
| CVE-2026-116320 | 8.8 HIGH | PostgreSQL plperl array and hash conversion use-after-free executes arbitrary code |
Showing top 20 of 56 CVEs. View all on vendor page → →
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