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      <title>CVE-2026-118653 — Echo: Rate Limiter Bypass via Spoofed X-Forwarded-For Header in Default Configuration</title>
      <link>https://db.gcve.eu/vuln/cve-2026-118653</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; labstack echo&lt;/p&gt;
&lt;p&gt;Echo is a Go web framework. From 4.0.0 until 5.1.0, Context.RealIP falls back to client-supplied X-Forwarded-For or X-Real-IP values when Echo.IPExtractor is unset, and the default RateLimiter uses that result as its client identifier. A remote attacker can rotate arbitrary forwarded-address values to obtain new rate-limit buckets and bypass IP-based throttling used for controls such as brute-force or request-volume protection. This issue is fixed in Echo v5.1.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; labstack echo&lt;/p&gt;
&lt;p&gt;Echo is a Go web framework. From 4.0.0 until 5.1.0, Context.RealIP falls back to client-supplied X-Forwarded-For or X-Real-IP values when Echo.IPExtractor is unset, and the default RateLimiter uses that result as its client identifier. A remote attacker can rotate arbitrary forwarded-address values to obtain new rate-limit buckets and bypass IP-based throttling used for controls such as brute-force or request-volume protection. This issue is fixed in Echo v5.1.0.&lt;/p&gt;</content:encoded>
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