Dashboard / CVE-2026-7818

CVE-2026-7818

HIGH
MEDIUM Priority: 0.01 BB Relevance: 40/100
Published: 2026-05-11 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: High
PR: Low
UI: None
S: X
AT: None
VC: High
VI: High
VA: High

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
pgadmin pgadmin_4 < 9.15

References & Advisories (1)

https://github.com/pgadmin-org/pgadmin4/issues/9901
Issue Tracking Patch Vendor Advisory

Bug Bounty Relevance

40 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

7.3 / 10.0 v4.0
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.13%
Raw Score 0.001310
Percentile 2.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00131
2026-10-28
0.00131

Intelligence Sources

nvd ref →

External Links