Homer: Authentication bypass in API due to empty JWT secret
Summary
Homer is open source software for capturing and monitoring SIP/VoIP signalling. Because the JWT secret defaults to an empty string, the JWT middleware accepts every request on the protected API paths /api/v1, /api/v3 and /api/v4 without authentication on a default installation. An unauthenticated attacker who can reach the API can read or change data, with no credentials or user interaction required.
Affected
- Homer versions prior to 11.0.283
- Default installations with no coordinator.jwt.secret configured
- Homer 7 (homer-app) is not confirmed as affected or unaffected by the vendor sources
Fixed in
- Homer 11.0.283 (enforces JWT on protected routes and auto-generates and persists a secret if none is set)
Workaround
Unknown. The vendor publishes no workaround. Until the update is applied, restrict access to the Homer API and UI to management networks only.
Exploitation
- No evidence of in-the-wild exploitation found; not listed in CISA KEV
- CISA SSVC assessment: exploitation PoC, automatable: yes, technical impact: total
- A third-party PoC description exists but has not been verified
Our recommendation
- Identify all Homer instances, including Homer 7 and container deployments, and record their versions
- Upgrade to Homer 11.0.283 or later and set an explicit JWT secret
- Remove direct internet exposure of the Homer API and UI
- Review web and access logs for unauthenticated requests to /api/ paths from unknown sources
- Rotate admin credentials and check the user list and database settings for unexpected changes
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- GitHub Security Advisory GHSA-rqcc-94gv-wjm9 github.com
- Homer release 11.0.283 github.com
- Fix commit 5e90809 github.com
- Pull request #839 github.com
- OSV CVE-2026-62253 osv.dev
- VulDB 415088 vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 20:48.
Original description (NVD)
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.
NVD references (5)
- https://github.com/sipcapture/homer/commit/5e90809657c9df321db191a69c6050f873f5646b
- https://github.com/sipcapture/homer/pull/839
- https://github.com/sipcapture/homer/releases/tag/11.0.283
- https://github.com/sipcapture/homer/security/advisories/GHSA-rqcc-94gv-wjm9
- https://github.com/sipcapture/homer/security/advisories/GHSA-rqcc-94gv-wjm9
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.