SSRF in Samuelclay Newsblur
CVE-2026-56771
NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Samuelclay Newsblur — versions 0
Weakness classification (CWE)
References
- github.com/samuelclay/NewsBlur/releases/tag/Android_14.5.0 (release-notes)
- github.com/samuelclay/NewsBlur/commit/2e6c6812c94f35a731bda864de5aef39f18307f1 (patch)
- github.com/samuelclay/NewsBlur/commit/af742daeca7cc6c8b0d58cbea381e7bc44daa520 (patch)
- www.vulncheck.com/advisories/newsblur-server-side-request-forgery-via-add-url-e… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56771?
- CVE-2026-56771 is a high-severity vulnerability in Samuelclay Newsblur, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-06-25.
- How severe is CVE-2026-56771?
- High severity. CVSS v3 base score is 8.5 out of 10.