listmonk: SQL Injection in /api/subscribers/export bypasses table access control, leaking admin password hashes and SMTP credentials

Exploitation

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

CVSS

5.5 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

EPSS

• CVE-2026-62361: 0.30% estimated exploitation activity in the next 30 days; percentile 22.52 (FIRST EPSS, 2026-11-10). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A SQL injection vulnerability in `GET /api/subscribers/export` allows an authenticated user with the `subscribers:sql_query` permission to bypass the table access control that exists on the regular query endpoint (`GET /api/subscribers`) and read arbitrary tables from the database — including `users` (bcrypt password hashes) and `settings` (SMTP credentials, API keys). Both error-based and time-based exfiltration techniques are confirmed to work. This creates a privilege escalation path: `subscribers:sql_query` → hash exfiltration → offline bcrypt crack (cost factor 6) → Super Admin account takeover. ---

Details The subscriber query feature accepts a user-controlled `query` parameter that is injected directly into a SQL template via `strings.ReplaceAll`. The regular query endpoint `GET /api/subscribers` correctly calls `validateQueryTables` to block access to sensitive tables before execution. The export endpoint `GET /api/subscribers/export` **omits this call…

Published by the source

6 Nov 2026, 18:15 UTC

Last modified by the source

6 Nov 2026, 18:30 UTC

Source last checked

7 Nov 2026, 06:05 UTC

1. Revision 2 · amended · 7 Nov 2026

   Amended from osv record GHSA-xgjr-7j9q-2h4r

2. Revision 1 · created · 6 Nov 2026

   Published from ghsa record GHSA-xgjr-7j9q-2h4r

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# Patch Next advisory brief: CVE-2026-62361

Advisory: listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials
IDs: CVE-2026-62361, GHSA-xgjr-7j9q-2h4r
Record: https://patchnext.com/advisories/cve-2026-62361 (revision 2, source checked 7 Nov 2026, 06:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/knadh/listmonk 1.1.1-0.20260619102436-c0a6525009a6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/knadh/listmonk: affected < 1.1.1-0.20260619102436-c0a6525009a6; fixed in 1.1.1-0.20260619102436-c0a6525009a6

## Suggested inspection (read-only)
- Go github.com/knadh/listmonk: check the installed version with your package manager.

## 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 github.com/knadh/listmonk.
- 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://github.com/advisories/GHSA-xgjr-7j9q-2h4r (GitHub-reviewed advisory GHSA-xgjr-7j9q-2h4r lists affected ranges: Go github.com/knadh/listmonk >=0 <1.1.1-0.20260619102436-c0a6525009a6)
- Verified: https://osv.dev/vulnerability/GHSA-xgjr-7j9q-2h4r (OSV record GHSA-xgjr-7j9q-2h4r lists affected ranges: Go github.com/knadh/listmonk >=0 <1.1.1-0.20260619102436-c0a6525009a6 (fixed))

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