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CVE-2026-61818— pg_partman SQL injection in undo partition time encoder

Quick assessment

Affected
pgpartman pg_partman
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.

是一个用于按时间或 ID 管理分区表的 PostgreSQL 扩展。在 5.5.0 之前的版本中， 函数将 作为无限制的文本读取，并在动态执行的 SELECT 语句中直接插值（未对标识符进行引用/转义）。拥有 访问权限的角色可以在 中存储 SQL 语句而非函数名，该 SQL 将以调用 的调用者权限执行。 该函数不属于默认的后台工作进程（background-worker）执行路径，这限制了与相关“创建分区”漏洞中描述的自动超级用户权限提升的影响范围；但具有较高权限的调用者仍可被利用，导致其可用的机密性、完整性和可用

CVSS 8.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
pgpartman pg_partman < 5.5.0 affected
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I. Basic Information for CVE-2026-61818

Vulnerability Information
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Vulnerability Title
pg_partman SQL injection in undo partition time encoder
Source: CVE Program / CVE List V5
Vulnerability Description
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pgpartman pg_partman < 5.5.0 -

II. Public POCs for CVE-2026-61818

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III. Intelligence Information for CVE-2026-61818

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Vendor Advisories for CVE-2026-61818 (1)

Other References for CVE-2026-61818 (1)

Same Patch Batch · pgpartman · 2026-09-18 · 7 CVEs total

CVE-2026-61781 9.9 CRITICAL pg_partman has privilege escalation through SQL injection in create_partition_time()
CVE-2026-61820 8.5 HIGH pg_partman privilege escalation via SQL injection when inheriting template properties
CVE-2026-61817 8.5 HIGH pg_partman privilege escalation via SQL injection in several functions via time decoder
CVE-2026-61819 8.5 HIGH pg_partman privilege escalation via SQL injection in when using pg_jobmon and encountering
CVE-2026-61821 8.5 HIGH pg_partman authorization bypass to move child tables between schemas during retention
CVE-2026-61822 6.5 MEDIUM pg_partman disable maintenance for all partition sets

IV. Related Vulnerabilities

Same product: pg_partman
Same vendor: pgpartman
Same weakness: CWE-89

V. Comments for CVE-2026-61818

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