CVE-2026-45045

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{"affected": [{"affectedData": [{"product": "fiber", "vendor": "gofiber", "versions": [{"status": "affected", "version": ">= 3.0.0-beta.2, < 3.3.0"}, {"status": "affected", "version": "< 2.52.14"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*", "matchCriteriaId": "34B804BA-609E-4B3E-80E0-D1D3EC25E3F0", "versionEndExcluding": "2.52.14", "vulnerable": true}, {"criteria": "cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*", "matchCriteriaId": "A091E1AB-E012-47CA-9674-734334483EF0", "versionEndExcluding": "3.3.0", "versionStartIncluding": "3.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Fiber is an Express inspired web framework written in Go. Prior to 3.3.0 and 2.52.14, the BalancerForward proxy helper in middleware/proxy/proxy.go uses Header.Add() instead of Header.Set() when injecting X-Real-IP, allowing an attacker-supplied first X-Real-IP value to be forwarded to upstream servers for logging, rate limiting, and access control. This issue is fixed in version 3.3.0 and 2.52.14."}, {"lang": "es", "value": "Fiber es un framework web inspirado en Express escrito en Go. Antes de las versiones 3.3.0 y 2.52.14, el asistente de proxy BalancerForward en middleware/proxy/proxy.go utiliza Header.Add() en lugar de Header.Set() al inyectar X-Real-IP, permitiendo que un primer valor de X-Real-IP proporcionado por el atacante sea reenviado a los servidores ascendentes para registro, limitaci\u00f3n de velocidad y control de acceso. Este problema est\u00e1 solucionado en las versiones 3.3.0 y 2.52.14."}], "id": "CVE-2026-45045", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45045", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-09T13:19:42.395861Z", "version": "2.0.3"}}]}, "published": "2026-07-08T20:16:50.060", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/gofiber/fiber/commit/1403cc8292da3220e9316960b4030cc722a0f396"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/gofiber/fiber/commit/33c9501288ab47a429c8b5e701493f0c3c0af37d"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/gofiber/fiber/pull/4260"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/gofiber/fiber/pull/4495"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/gofiber/fiber/releases/tag/v2.52.14"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/gofiber/fiber/releases/tag/v3.3.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-gcfq-8gqf-4876"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-290"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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