boringproxy 0.10.0 SSH authorized_keys Injection via Tunnel Creation
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
boringproxy through 0.10.0 contains a newline injection vulnerability that allows authenticated low-privileged users with tunnel-creation permission to inject arbitrary lines into the server account's SSH authorized_keys file by supplying a percent-encoded newline character in the domain parameter of the tunnel creation endpoint. Attackers can insert an unrestricted public key entry into authorized_keys to gain persistent shell access, and subsequently read cleartext credentials from the database file including all user tokens, tunnel private keys, and TLS certificates.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| boringproxy | boringproxy | up to 0.10.0 | — | No fix listed | CNA |
- boringproxy Vendorboringproxy Affected up to 0.10.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-70615
- 2026-10-03 Alias added: GHSA-85pm-3999-r2fw
References
Exploit 1
More boringproxy vulnerabilities
- TI-2026-49331 boringproxy 0.10.0 Resource Exhaustion DoS via GET /loading endpoint CVSS 4.0HIGH 7.1
Sources
- CVE-2026-70615 · CVE Program
- CVE-2026-70615 · NVD
- FIRST EPSS
- GHSA-85pm-3999-r2fw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences