CVE-2026-7818: Deserialization of untrusted data (CWE-502) in pgAdmin 4 FileBackedSessionManager. The session manager perfor

Q: How do I fix CVE-2026-7818?

pgadmin 4: upgrade to 9.15. Exact commands for each OS are on this page.

Q: Is CVE-2026-7818 being exploited?

CVE-2026-7818 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-7818 affect?

CVE-2026-7818 affects pgadmin 4. Severity is high (CVSS 7.0). 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 HM

Routine

HIGH 7.0UPGRADE

CVE-2026-7818 is a high-severity flaw (CVSS 7.0) affecting pgadmin 4. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 combinatio

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-05-11
Last modified	2026-10-26

Publisher (CNA): PostgreSQL · Vendor: pgadmin

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-11 16:17 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

pgadmin pgadmin 4 UPGRADE

Affected: < 9.15

Fixed in: 9.15

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pgadmin-4 || rpm -q pgadmin-4 || pgadmin-4 --version

2. UPGRADE to 9.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pgadmin-4

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pgadmin-4

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-7818?

pgadmin 4: upgrade to 9.15. Exact commands for each OS are on this page.

Is CVE-2026-7818 being exploited?

CVE-2026-7818 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-7818 affect?

CVE-2026-7818 affects pgadmin 4. Severity is high (CVSS 7.0). 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 HM

How urgent is CVE-2026-7818?

Priority 25/100. High severity

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-7816 HIGH 8.8 UPGRADE OS command injection (CWE-78) vulnerability in pgAdmin 4 Import/Export query export. User-supplied input was
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CVE-2026-7815 HIGH 8.8 UPGRADE SQL injection vulnerability in pgAdmin 4 Maintenance Tool. Four user-supplied JSON fields (buffer_usage_limit
CVE-2026-7819 HIGH 8.1 UPGRADE Symbolic-link path traversal (CWE-61, CWE-22) in pgAdmin 4 File Manager. check_access_permission used os.path
CVE-2026-7820 MEDIUM 6.5 UPGRADE Improper restriction of excessive authentication attempts (CWE-307) in pgAdmin 4. pgAdmin enforces MAX_LOGIN_

References

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