Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-61821— pg_partman authorization bypass to move child tables between schemas during retention

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 PostgreSQL 扩展，用于通过时间或 ID 来管理分区表。在 5.5.0 之前的版本中， 和 使用 作为 的目标，并接受任意非空的模式名。拥有 访问权限的角色可以选择一个该角色本身不具备普通 CREATE 权限的目标模式，而后台工作进程会以 的特权执行迁移操作，该角色默认为 PostgreSQL 超级用户，从而绕过了普通 操作本应执行的权限检查。这使得保留的子表可以在不同模式之间进行未授权的迁移。该问题已在 5.5.0 版本中修复。

CVSS 8.5 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
pgpartman pg_partman < 5.5.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-61821

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
pg_partman authorization bypass to move child tables between schemas during retention
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, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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-2026-61821

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-61821

请登录查看更多情报信息。

Other References for CVE-2026-61821 (2)

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-2026-61818 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-2026-61822 6.5 MEDIUM pg_partman disable maintenance for all partition sets

IV. Related Vulnerabilities

Same product: pg_partman
Same vendor: pgpartman
Same weakness: CWE-862

V. Comments for CVE-2026-61821

No comments yet

Leave a comment