CVE-2026-45045

{"id": "CVE-2026-45045", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45045", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-09T13:19:42.395861Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "gofiber", "product": "fiber", "versions": [{"status": "affected", "version": ">= 3.0.0-beta.2, < 3.3.0"}, {"status": "affected", "version": "< 2.52.14"}]}]}], "published": "2026-07-08T20:16:50.060", "references": [{"url": "https://github.com/gofiber/fiber/commit/1403cc8292da3220e9316960b4030cc722a0f396", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/commit/33c9501288ab47a429c8b5e701493f0c3c0af37d", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/pull/4260", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/pull/4495", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/releases/tag/v2.52.14", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/releases/tag/v3.3.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/gofiber/fiber/security/advisories/GHSA-gcfq-8gqf-4876", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-290"}]}], "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."}], "lastModified": "2026-07-15T20:50:55.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "34B804BA-609E-4B3E-80E0-D1D3EC25E3F0", "versionEndExcluding": "2.52.14"}, {"criteria": "cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "A091E1AB-E012-47CA-9674-734334483EF0", "versionEndExcluding": "3.3.0", "versionStartIncluding": "3.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}