Homer: Complete Authentication Bypass When coordinator.jwt.secret Is Empty (Default)

published 2026-10-07 32 d ago modified 2026-10-20 20 d ago also GHSA-rqcc-94gv-wjm9 , GO-2026-6673 , EUVD-2026-94523

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

Homer is open source telecom observability software. Prior to version 11.0.283, both JWT middleware functions (`JWTMiddleware` and `JWTMiddlewareV4`) immediately return `next(c)` when `jwtSecret == ""`. The JWT secret defaults to an empty string. On a default installation, all protected API endpoints under `/api/v1`, `/api/v3`, and `/api/v4` are completely unauthenticated. Version 11.0.283 patches the issue.

Patch / fix

fixed in 1 links 3

go github.com/sipcapture/homer-app 0.0.0-20260625093330-5e90809657c9

github.com/sipcapture/homer@5e90809 commit
github.com/sipcapture/homer#839 pull request
github.com/sipcapture/homer/releases/tag/11.0.283 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 30 d ago (2026-10-10)

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/sipcapture/homer/security/advisories/GHSA-rqcc-94gv-wjm9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/sipcapture/homer-app	<0.0.0-20260625093330-5e90809657c9 all versions	0.0.0-20260625093330-5e90809657c9

Affected products

sipcapture homer

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

github.com /sipcapture/homer/pull/839
web
github.com /sipcapture/homer/commit/5e90809657c9df321db191a69c6050f873f5646b
web
github.com /sipcapture/homer/security/advisories/GHSA-rqcc-94gv-wjm9
exploit, web, advisory
github.com /sipcapture/homer/releases/tag/11.0.283
web
github.com /sipcapture/homer
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary