CVE-2026-118653

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{"bugzilla": {"description": "github.com/labstack/echo: Echo: Rate limiting bypass via spoofed IP headers", "id": "2563160", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563160"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "cwe": "CWE-807", "details": ["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.", "A flaw was found in Echo. When an IP address extractor is not explicitly configured, the framework trusts client-supplied forwarded HTTP headers to determine the client's network address. A remote attacker can exploit this flaw by sending requests with rotating or spoofed IP header values. This allows the attacker to bypass IP-based rate limiting and request throttling, potentially enabling unconstrained brute-force and credential stuffing attacks against protected endpoints."], "name": "CVE-2026-118653", "public_date": "2026-10-28T19:42:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118653\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118653\nhttps://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2\nhttps://github.com/labstack/echo/releases/tag/v5.1.0\nhttps://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq"], "statement": "This vulnerability is rated as Moderate because remote unauthenticated attackers can circumvent IP-based request throttling by supplying arbitrary forwarded headers, but it does not directly compromise data confidentiality, system integrity, or cause service disruption. In typical deployments where Echo-based services implement rate limiting without explicitly configuring a trusted IP extraction strategy, default behavior allows forged client address headers to allocate fresh rate-limit quotas. The blast radius is confined to secondary controls such as brute-force or volume throttling protections, requiring additional application-layer flaws to achieve deeper impact.", "threat_severity": "Moderate"}

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