Homer: Hardcoded Default Admin Password 'sipcapture' With No Forced Change on First Login

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Homer is open source telecom observability software. Prior to version 11.0.283, on every fresh Homer deployment using internal authentication, the bootstrap process automatically creates an `admin` account with the password `sipcapture` (stored as a legacy SHA-256 hex hash). There is no first-login forced-change mechanism. Any attacker who reaches the login endpoint immediately gains full administrative access. Version 11.0.283 patches the issue.

Source published

7 Oct 2026 16:12:58 UTC

Source modified

7 Oct 2026 17:44:17 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Homer is open source telecom observability software. Prior to version 11.0.283, on every fresh Homer deployment using internal authentication, the bootstrap process automatically creates an `admin` account with the password `sipcapture` (stored as a legacy SHA-256 hex hash). There is no first-login forced-change mechanism. Any attacker who reaches the login endpoint immediately gains full administrative access. Version 11.0.283 patches the issue.

Source published

Oct 7, 2026, 4:12:58 PM (timezone not stated)

Source modified

Oct 7, 2026, 5:44:17 PM (timezone not stated)

Observed here

7 Nov 2026 13:27:59 UTC

Source terms

ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Homer is open source telecom observability software. Prior to version 11.0.283, on every fresh Homer deployment using internal authentication, the bootstrap process automatically creates an `admin` account with the password `sipcapture` (stored as a legacy SHA-256 hex hash). There is no first-login forced-change mechanism. Any attacker who reaches the login endpoint immediately gains full administrative access. Version 11.0.283 patches the issue.

Source published

7 Oct 2026 17:16:56 UTC

Source modified

8 Oct 2026 21:09:00 UTC

Observed here

25 Oct 2026 14:19:28 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

### Summary On every fresh Homer deployment using internal authentication, the bootstrap process automatically creates an `admin` account with the password `sipcapture` (stored as a legacy SHA-256 hex hash). There is no first-login forced-change mechanism. Any attacker who reaches the login endpoint immediately gains full administrative access. ### Details **`config/config.go` lines 858-861:** ```go // DefaultInternalAuthPasswordHash is the SHA-256 hex digest of the default // bootstrap password (cleartext: sipcapture). const DefaultInternalAuthPasswordHash = "883ffc1f37fd0fe542b0fb9740035c4383e7d976c411161d24e62edace280f90" ``` **`coordinator/services/auth_bootstrap.go` lines 20-71:** `EnsureBootstrapAdminUser()` runs at startup. If no admin user exists, it inserts a row with `username=admin`, `password_hash=DefaultInternalAuthPasswordHash`. No `force_change`, no `first_login` flag, no expiry is set. **`coordinator/services/auth_bootstrap_test.go` line 114** confirms the plaintext: ```go u, err := svc.Authenticate(ctx, "admin", "sipcapture") ``` **`passwordhash/password.go` lines 36-45:** Legacy SHA-256 hex hashes are accepted via `legacySHA256HexEqual`, so the default credential is functional on any deployment. ### PoC ```bash # Authenticate with default credentials — works on any fresh Homer deployment curl -s -X POST http://<homer-host>/api/v3/auth \ -H 'Content-Type: application/json' \ -d '{"username":"admin","password":"sipcapture"}' # Response: {"token":"<admin-jwt>","data":{"userGroup":"admin"}} # Use the token to access all admin functionality curl -H "Authorization: Bearer <admin-jwt>" http://<homer-host>/api/v3/users ``` ### Impact Use of Hard-coded Credentials (CWE-798). Any attacker who can reach a freshly deployed Homer instance gains immediate full administrative access using the publicly documented default password, with no lockout, rate limiting, or forced password change required. ### Fix Remove the hardcoded `DefaultInternalAuthPasswordHash` constant. Require operators to provide a hashed admin password in the configuration file. Alternatively, generate a random password on first startup, print it to stdout once, and immediately force a change on first login. If possible, please apply for a CVE number when posting.

Source published

7 Oct 2026 16:12:02 UTC

Source modified

20 Oct 2026 00:55:38 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Publisher rating · CRITICAL

Homer: Hardcoded Default Admin Password 'sipcapture' With No Forced Change on First Login in github.com/sipcapture/homer-app. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/sipcapture/homer-app before v0.0.0-20260625091610-b2e942031ff8.

Source published

20 Oct 2026 00:20:56 UTC

Source modified

20 Oct 2026 00:45:10 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.