Authenticated Server-Side Request Forgery (SSRF) via feed URL in Stringer
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Stringer is a self-hosted, anti-social RSS reader. Prior to commit 75cb095, an unrestricted Server-Side Request Forgery (SSRF) vulnerability allows any authenticated user to force the Stringer server to send arbitrary HTTP/HTTPS requests to internal networks, localhost services, and cloud metadata endpoints (e.g. AWS IMDS 169.254.169.254). When self-service signup is enabled (Setting::UserSignup), even a low-privileged registered user can exploit this to scan internal services or steal cloud IAM credentials. This issue has been patched via commit 75cb095.
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 |
|---|---|---|---|---|---|
| stringer-rss | stringer | before 75cb0955919a362ac49d23c8a14892d0f59ea1c4 | 75cb0955919a362ac49d23c8a14892d0f59ea1c4 | Patch available | CNA |
- stringer Vendorstringer-rss Affected before 75cb0955919a362ac49d23c8a14892d0f59ea1c4 Fixed in 75cb0955919a362ac49d23c8a14892d0f59ea1c4 Patch available CNA
Remediation
- Fix · CNA stringer (stringer-rss) Fixed in 75cb0955919a362ac49d23c8a14892d0f59ea1c4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-55160
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences