What’s Vulnerable › Vulnerabilities

CVE-2026-108735: Miniflux 2.3.0 through 2.3.3 SSRF via Per-Feed Proxy URL

• Severity: medium (CVSS 4.3 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: 2026-10-11 · updated 2026-10-16
• Weakness: CWE-918

Description

Miniflux 2.3.0 through 2.3.3 contains a server-side request forgery vulnerability that allows authenticated users to reach internal addresses by setting a feed's proxy_url. Attackers can point proxy_url at loopback or internal hosts, bypassing FETCHER_ALLOW_PRIVATE_NETWORKS checks to probe internal ports and send proxy-style requests to internal services.

Affected products

• miniflux: from 2.3.0 through 2.3.3

References

• https://github.com/miniflux/v2
• https://github.com/miniflux/v2/blob/c4d54f87a81b30aa173fddf05d7ff83ae7da5796/internal/reader/fetcher/request_builder.go#L155-L220
• https://github.com/miniflux/v2/blob/c4d54f87a81b30aa173fddf05d7ff83ae7da5796/internal/urllib/url.go#L64-L72
• https://hackmd.io/@haind03/miniflux-feed-proxy-url-private-network-bypass
• https://www.vulncheck.com/advisories/miniflux-2.3.0-through-2.3.3-ssrf-via-per-feed-proxy-url

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