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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1545df20ad advisory.

    Update to pgadmin4-9.15.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-68f6155fea advisory.

    Update to pgadmin4-9.15.


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-7818)

ID	Name	Product	Family	Severity
315979	Fedora 43 : pgadmin4 (2026-1545df20ad)	Nessus	Fedora Local Security Checks	critical
315975	Fedora 44 : pgadmin4 (2026-68f6155fea)	Nessus	Fedora Local Security Checks	critical
442092	SCA: security update for pgadmin4 (GHSA-4rhg-h8f2-v4jm)	Tenable Cloud Security	SCA Checks	high
442092	SCA: security update for pgadmin4 (GHSA-4rhg-h8f2-v4jm)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2026-7818

high

Tenable Plugins

critical

critical

high

high