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CVE-2026-61817— pg_partman privilege escalation via SQL injection in several functions via time decoder

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.

pg_partman 是一个用于通过时间或 ID 管理 PostgreSQL 分区表的扩展。在 5.5.0 之前， 、 、 、 和 函数会将可写的 文本值未加标识符引号地插入到动态 SQL 中。拥有文档中所述的 权限的角色可以存储 SQL 语句，而不仅仅是解码器函数名。当受影响的后续操作使用被污染的该值时（包括针对基于文本或 UUID 键集的 维护任务），该 SQL 将以执行该操作的权限运行，而该权限可能是默认的 PostgreSQL 超级用户后台工作进程（background worker）角色。由于持久化的行可

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-2026-61817

Vulnerability Information
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Vulnerability Title
pg_partman privilege escalation via SQL injection in several functions via time decoder
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, run_maintenance(), show_partitions(), show_partition_info(), undo_partition(), and partition_data_time() interpolate the writable part_config.time_dncoder text value without identifier quoting into dynamic SQL. A role with the documented partman_user privileges can store SQL rather than a decoder function name. When an affected operation later uses the poisoned value, including pg_partman_bgw maintenance for a text- or UUID-keyed set, the SQL executes with the operation's privileges, which can be the default PostgreSQL superuser background-worker role. The persistent row can restore elevated access on later ticks, and successful exploitation can permit database-wide compromise and operating-system command execution as the PostgreSQL service account. 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-2026-61817

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III. Intelligence Information for CVE-2026-61817

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Vendor Advisories for CVE-2026-61817 (1)

Other References for CVE-2026-61817 (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-2026-61818 8.5 HIGH pg_partman SQL injection in undo partition time encoder
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-2026-61817

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