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High, CVSS 8.5

Komari vulnerable to 2FA Authentication Bypass

GHSA-jhmr-57cj-q6g9

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/komari-monitor/komari 0.0.0-20250809064056-cc3d54bff4c6), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
8.5 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Summary Logic error in 2FA verification condition allows bypass of two-factor authentication Details https://github.com/komari-monitor/komari/blob/bd5a6934e1b79a12cf1e6a9bba5372d0e04f3abc/api/login.go#L55 There is no way for Verify2Fa to return an error AND true as ok at the same time, any codes are considered as valid. PoC Use any 6 digits as 2FA code Impact Bypass 2FA Authentication

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-jhmr-57cj-q6g9

Agent brief

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# Patch Next advisory brief: GHSA-jhmr-57cj-q6g9

Advisory: Komari vulnerable to 2FA Authentication Bypass
IDs: GHSA-jhmr-57cj-q6g9
Record: https://patchnext.com/advisories/ghsa-jhmr-57cj-q6g9 (revision 1, source checked 26 Oct 2026, 15:10 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/komari-monitor/komari 0.0.0-20250809064056-cc3d54bff4c6. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/komari-monitor/komari: affected < 0.0.0-20250809064056-cc3d54bff4c6; fixed in 0.0.0-20250809064056-cc3d54bff4c6

## Suggested inspection (read-only)
- Go github.com/komari-monitor/komari: 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/komari-monitor/komari.
- 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-jhmr-57cj-q6g9 (GitHub-reviewed advisory GHSA-jhmr-57cj-q6g9 lists affected ranges: Go github.com/komari-monitor/komari >=0 <0.0.0-20250809064056-cc3d54bff4c6)

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