CVE-2026-7818
7.0 · HIGHOverview
CVE-2026-7818 is a high-severity vulnerability affecting pgadmin pgadmin_4. It was published on May 11, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from pgadmin. Update pgadmin_4 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| pgadmin | pgadmin_4 | >= 0, < 9.15 | Affected |
Frequently Asked Questions
What is CVE-2026-7818?
CVE-2026-7818 is a high-severity vulnerability affecting pgadmin pgadmin_4. It was published on May 11, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).
How severe is CVE-2026-7818?
This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-7818?
Check the references section for vendor advisories and patches from pgadmin. Update pgadmin_4 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-7818?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-7818 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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