Read the docs
TI-2026-06880 Aliases CVE-2026-7818GHSA-4rhg-h8f2-v4jm

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

Priority LOW 33CWE-502Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00131 2nd percentileScored 2026-11-07
Fix Fixed pgAdmin 4 (pgadmin.org): 9.15pgadmin4 (PyPI): 9.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pgadmin.orgpgAdmin 4before 9.159.15Patch availableCNA
—pgadmin4 (PyPI)before 9.159.15Patch availableGHSA-4rhg-h8f2-v4jm
  • pgAdmin 4 Vendorpgadmin.org Affected before 9.15 Fixed in 9.15 Patch available CNA
  • pgadmin4 (PyPI) Vendor— Affected before 9.15 Fixed in 9.15 Patch available GHSA-4rhg-h8f2-v4jm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pgadmin:pgadmin_4:*:*:*:*:*:postgresql:*:*before 9.15Vulnerablepgadmin.org
  • cpe:2.3:a:pgadmin:pgadmin_4:*:*:*:*:*:postgresql:*:* Versions before 9.15 Vulnerable ·pgadmin.org

Remediation

  • Fix · CNA pgAdmin 4 (pgadmin.org) Fixed in 9.15
  • Fix · GHSA-4rhg-h8f2-v4jm pgadmin4 (PyPI) Fixed in 9.15 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    pgadmin.org pgAdmin 4 9.15

    8 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-06875 pgAdmin 4: Cross-user data access and shared-server privilege escalation in server modePriority HIGH 76
    • TI-2026-06876 pgAdmin 4: Stored XSS via crafted PostgreSQL object names in Browser Tree and Explain VisualizerPriority MEDIUM 55
    • TI-2026-06878 pgAdmin 4: OS command injection in Import/Export query export via psql metacommand breakoutPriority MEDIUM 43
    Show all 8 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7818
  2. 2026-10-03 Alias added: GHSA-4rhg-h8f2-v4jm

References

Patch 1

Advisory 1

Other 2

  • TI-2024-01901 Unsafe Deserialisation and Remote Code Execution by an Authenticated user in pgAdmin 4 CVSS 3.1CRITICAL 9.9
  • TI-2024-02918 Remote Code Execution Vulnerability through the validate binary path API in pgAdmin 4 CVSS 3.1CRITICAL 9.8
  • TI-2022-03867 Code injection in pgadmin4 CVSS 3.1HIGH 8.8
  • TI-2026-06875 pgAdmin 4: Cross-user data access and shared-server privilege escalation in server mode CVSS 4.0CRITICAL 9.4
  • TI-2025-02572 pgAdmin 4: Remote Code Execution in Query Tool and Cloud Deployment CVSS 3.1CRITICAL 9.9
  • TI-2023-00228 Path traversal in pgadmin CVSS 3.1MEDIUM 6.5
See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences