What’s Vulnerable › Vulnerabilities

CVE-2026-55160: Authenticated Server-Side Request Forgery (SSRF) via feed URL in Stringer

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-28 · updated 2026-09-30
• Weakness: CWE-918

Description

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.

Affected products

• stringer-rss stringer: before 75cb0955919a362ac49d23c8a14892d0f59ea1c4

References

• https://github.com/stringer-rss/stringer/commit/75cb0955919a362ac49d23c8a14892d0f59ea1c4
• https://github.com/stringer-rss/stringer/pull/1548
• https://github.com/stringer-rss/stringer/security/advisories/GHSA-496x-437q-h35q
• https://github.com/stringer-rss/stringer/security/advisories/GHSA-496x-437q-h35q

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