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CVE-2026-54689 is a server-side request forgery vulnerability in the mcp-searxng web_url_read feature that persists even when hardened mode is enabled. The flaw allows hardened-mode protections to be bypassed through redirect chains, use of 0.0.0.0, and canonicalized IPv4-mapped IPv6 literals, resulting in insufficient validation of destination addresses. The vulnerable logic fails to consistently re-validate each redirect hop and does not fully block special-purpose or internal address representations, enabling requests intended for external resources to be redirected or encoded toward loopback or internal network targets.
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No public exploit code observed for this vulnerability.
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No public activity observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
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