---
title: "CVE-2026-4404: Harbor allows the use of the default password for web UI login"
url: https://erroneo.us/security/cve/CVE-2026-4404/
description: "CVE-2026-4404 (github.com/goharbor/harbor (Go)): Use of hard coded credentials in GoHarbor Harbor version 2.15.0 and below, allows attackers to use the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-23
date_modified: 2026-03-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-4404"
kev: false
cvss: 9.4
epss: 0.00595
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-4404: Harbor allows the use of the default password for web UI login

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/goharbor/harbor (Go) <= 2.15.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

Use of hard coded credentials in GoHarbor Harbor version 2.15.0 and below, allows attackers to use the default password and gain access to the web UI.

## Affected packages

- Go `github.com/goharbor/harbor` <= 2.15.0 → fixed: none listed

## Affected products (CVE record)

- Harbor Harbor: 0.1.0 <= 2.15.0

## Severity

- CISA-ADP CVSS 3.1: 9.4 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`
- GitHub CVSS 3.1: 9.4 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.60% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [GitHub Advisory GHSA-hj7x-hmf2-hc2p](https://github.com/advisories/GHSA-hj7x-hmf2-hc2p)
- [CVE.org record CVE-2026-4404](https://www.cve.org/CVERecord?id=CVE-2026-4404)
- [NVD entry CVE-2026-4404](https://nvd.nist.gov/vuln/detail/CVE-2026-4404)
- [goharbor.io](https://goharbor.io/docs/1.10/install-config/run-installer-script/#:~:text=If%20you%20did%20not%20change%20them%20in%20harbor.yml,%20the%20default%20administrator%20username%20and%20password%20are%20admin%20and%20Harbor12345)
- [github.com](https://github.com/goharbor/harbor/issues/1937)
- [cwe.mitre.org](https://cwe.mitre.org/data/definitions/1393.html)
- [github.com](https://github.com/goharbor/harbor/pull/22751)
- [kb.cert.org](https://www.kb.cert.org/vuls/id/577436)

---
Source page: https://erroneo.us/security/cve/CVE-2026-4404/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt