CVE-2026-108735: Miniflux server-side request forgery via proxy_url

CVE-2026-108735 · Severity: medium · CVSS 4.3 · Published 2026-10-11

Miniflux is a minimalist feed reader that fetches and displays RSS/Atom feeds. A vulnerability in versions 2.3.0 through 2.3.3 allows authenticated users to bypass internal network protections by configuring a feed's proxy URL to point to internal hosts, enabling reconnaissance of internal services and potential data exfiltration.

Quick answers

Is CVE-2026-108735 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-108735 being exploited in the wild.
How severe is CVE-2026-108735?
Medium severity, with a CVSS score of 4.3, published 11 October 2026.
Which products and versions are affected?
Miniflux 2.3.0 through 2.3.3.
Is there a fix for CVE-2026-108735?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-108735 attacked?
It is attacked over the network.
Am I affected by CVE-2026-108735?
Check whether you run Miniflux at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A server-side request forgery (SSRF) vulnerability exists in the feed proxy functionality where the proxy_url parameter is insufficiently validated, allowing authenticated attackers to bypass FETCHER_ALLOW_PRIVATE_NETWORKS checks. The vulnerability permits an attacker to point the proxy at loopback (127.0.0.1) or private network addresses (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) to probe internal services and send HTTP requests to internal hosts.

Affected products

  • Miniflux Miniflux 2.3.0 through 2.3.3

Timeline

  • 2026-10-11: disclosed

References

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