Security Digest · Vulnerability record
CVE-2026-4404: Harbor allows the use of the default password for web UI login
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.
CVSS 9.4 Critical EPSS 0.6% · p48
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
From the GitHub advisory
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.
Weakness type: CWE-798, CWE-1393.
Product: github.com/goharbor/harbor (Go) · Assigned by: certcc · Published: 2026-03-23
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Go | github.com/goharbor/harbor | <= 2.15.0 | none listed |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Harbor | Harbor | 0.1.0 <= 2.15.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.4 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 9.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record published by certcc
- — GitHub-reviewed advisory GHSA-hj7x-hmf2-hc2p published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-hj7x-hmf2-hc2p github.com
- CVE.org record CVE-2026-4404 cve.org
- NVD entry CVE-2026-4404 nvd.nist.gov
Other references from the CVE record and advisory
- goharbor.io goharbor.io
- github.com github.com
- cwe.mitre.org cwe.mitre.org
- github.com github.com
- kb.cert.org kb.cert.org