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CVE-2026-7818— pgAdmin 4: Unsafe deserialization (CWE-502) in file-backed session manager leads to remote code execution

Quick assessment

Affected
pgadmin.org pgAdmin 4
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.

pgAdmin是pgAdmin开源的一个用于开源数据库 PostgreSQL 的开源管理和开发平台。 pgAdmin 4 9.15之前版本存在代码问题漏洞，该漏洞源于反序列化不可信数据，可能导致经过身份验证的用户通过放置特制序列化有效载荷实现远程代码执行。

CVSS 7.0 · High EPSS 0.13% · P3

Affected Version Matrix 1

VendorProduct Version RangeStatus
pgadmin.org pgAdmin 4 < 9.15 affected
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I. Basic Information for CVE-2026-7818

Vulnerability Information
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Vulnerability Title
pgAdmin 4: Unsafe deserialization (CWE-502) in file-backed session manager leads to remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
Deserialization of untrusted data (CWE-502) in pgAdmin 4 FileBackedSessionManager. The session manager performed unsafe deserialization of session-file contents (using Python's standard object-serialization module) before performing any HMAC integrity check. Any file dropped into the sessions directory was deserialized unconditionally. An authenticated user with write access to the sessions directory (whether by misconfiguration or in combination with another path-traversal flaw) could plant a crafted serialized payload to achieve operating-system level remote code execution under the pgAdmin process identity. Fix prepends a 64-byte hex SHA-256 HMAC over the session body, computed with SECRET_KEY, and verifies it via hmac.compare_digest before any deserialization. The check is raised (rather than asserted) on empty SECRET_KEY so it is not stripped under -O. This issue affects pgAdmin 4: before 9.15.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
pgAdmin 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pgAdmin是pgAdmin开源的一个用于开源数据库 PostgreSQL 的开源管理和开发平台。 pgAdmin 4 9.15之前版本存在代码问题漏洞，该漏洞源于反序列化不可信数据，可能导致经过身份验证的用户通过放置特制序列化有效载荷实现远程代码执行。
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
pgadmin.org pgAdmin 4 0 ~ 9.15 -

II. Public POCs for CVE-2026-7818

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III. Intelligence Information for CVE-2026-7818

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Vendor Advisories for CVE-2026-7818 (1)

Same Patch Batch · pgadmin.org · 2026-05-11 · 8 CVEs total

CVE-2026-7813 9.9 CRITICAL pgAdmin 4: Cross-user data access and shared-server privilege escalation in server mode
CVE-2026-7815 8.8 HIGH pgAdmin 4: SQL injection in Maintenance tool option values leading to remote code executio
CVE-2026-7816 8.8 HIGH pgAdmin 4: OS command injection in Import/Export query export via psql metacommand breakou
CVE-2026-7819 8.1 HIGH pgAdmin 4: Symbolic-link path traversal in File Manager allows arbitrary file write
CVE-2026-7817 6.5 MEDIUM pgAdmin 4: Local file inclusion and server-side request forgery in LLM API configuration e
CVE-2026-7820 6.5 MEDIUM pgAdmin 4: Account-lockout bypass via Flask-Security default /login view
CVE-2026-7814 4.8 MEDIUM pgAdmin 4: Stored XSS via crafted PostgreSQL object names in Browser Tree and Explain Visu

IV. Related Vulnerabilities

Same product: pgAdmin 4
Same vendor: pgadmin.org

V. Comments for CVE-2026-7818

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