pgAdmin 4: Improper restriction of excessive authentication attempts

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-7820: 0.21% estimated exploitation activity in the next 30 days; percentile 11.34 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Improper restriction of excessive authentication attempts (CWE-307) in pgAdmin 4. pgAdmin enforces MAXLOGINATTEMPTS only inside its custom /authenticate/login view. Flask-Security's default /login view, which is registered automatically by security.initapp() and is reachable on every server, never consulted the User.locked field: pgAdmin's User model relied on Flask-Security's UserMixin.islocked() (which always returns 'not locked') and Flask-Login's isactive (which only checks the active column, not locked). An attacker who triggered an account lockout via /authenticate/login could therefore obtain a session by re-submitting valid credentials directly to /login, defeating the brute-force-protection control for accounts using the INTERNAL authentication source. The same bypass also means that login attempts via /login are never rate-limited, so an attacker can perform an unbounded online password-guessing attack against INTERNAL accounts regardless of MAXLOGINATTEMPTS. Fix overrides…

Published by the source

11 May 2026, 18:31 UTC

Last modified by the source

10 Sep 2026, 03:51 UTC

Source last checked

26 Oct 2026, 13:41 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-hv9p-2pqf-r5w3

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-hv9p-2pqf-r5w3

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# Patch Next advisory brief: CVE-2026-7820

Advisory: pgAdmin 4: Improper restriction of excessive authentication attempts
IDs: CVE-2026-7820, GHSA-hv9p-2pqf-r5w3
Record: https://patchnext.com/advisories/cve-2026-7820 (revision 3, source checked 26 Oct 2026, 13:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pgadmin4 9.15. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI pgadmin4: affected < 9.15; fixed in 9.15

## Suggested inspection (read-only)
- `python -m pip show pgadmin4`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pgadmin4.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-hv9p-2pqf-r5w3 (OSV record GHSA-hv9p-2pqf-r5w3 lists affected ranges: PyPI pgadmin4 >=0 <9.15 (fixed))
- Verified: https://github.com/advisories/GHSA-hv9p-2pqf-r5w3 (GitHub-reviewed advisory GHSA-hv9p-2pqf-r5w3 lists affected ranges: PyPI pgadmin4 >=0 <9.15)

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