{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-119285", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-29T18:50:28.065Z", "datePublished": "2026-10-29T21:36:02.199Z", "dateUpdated": "2026-10-29T21:36:02.199Z"}, "containers": {"cna": {"title": "Fiber: CORS wildcard origins matched without a dot boundary, allowing credentialed cross-origin reads", "problemTypes": [{"descriptions": [{"cweId": "CWE-346", "lang": "en", "description": "CWE-346: Origin Validation Error", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-942", "lang": "en", "description": "CWE-942: Permissive Cross-domain Policy with Untrusted Domains", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf"}, {"name": "https://github.com/gofiber/fiber/pull/2915", "tags": ["x_refsource_MISC"], "url": "https://github.com/gofiber/fiber/pull/2915"}, {"name": "https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b", "tags": ["x_refsource_MISC"], "url": "https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b"}, {"name": "https://github.com/gofiber/fiber/releases/tag/v2.52.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/gofiber/fiber/releases/tag/v2.52.3"}], "affected": [{"vendor": "gofiber", "product": "fiber", "versions": [{"version": ">= 2.52.1, < 2.52.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-29T21:36:02.199Z"}, "descriptions": [{"lang": "en", "value": "Fiber is an Express inspired web framework written in Go. From 2.52.1 until 2.52.3, the CORS middleware's validateDomain wildcard matcher in middleware/cors/utils.go strips the scheme and checks only a host suffix without requiring a dot boundary. An application configured with a wildcard-subdomain AllowOrigins value and AllowCredentials enabled can reflect an unrelated attacker-controlled origin whose host merely ends with the configured base domain. A user who visits that origin can expose authenticated cross-origin responses to the attacker's page; empty-label origins and later comma-space parsing hardening are outside this advisory. This issue is fixed in version 2.52.3."}], "source": {"advisory": "GHSA-g5jq-qmqr-qrwf", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "fiber", "vendor": "gofiber", "versions": [{"status": "affected", "version": ">= 2.52.1, < 2.52.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Fiber is an Express inspired web framework written in Go. From 2.52.1 until 2.52.3, the CORS middleware's validateDomain wildcard matcher in middleware/cors/utils.go strips the scheme and checks only a host suffix without requiring a dot boundary. An application configured with a wildcard-subdomain AllowOrigins value and AllowCredentials enabled can reflect an unrelated attacker-controlled origin whose host merely ends with the configured base domain. A user who visits that origin can expose authenticated cross-origin responses to the attacker's page; empty-label origins and later comma-space parsing hardening are outside this advisory. This issue is fixed in version 2.52.3."}], "id": "CVE-2026-119285", "lastModified": "2026-10-29T22:17:01.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-29T22:17:01.367", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b"}, {"source": "security-advisories@github.com", "url": "https://github.com/gofiber/fiber/pull/2915"}, {"source": "security-advisories@github.com", "url": "https://github.com/gofiber/fiber/releases/tag/v2.52.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}, {"lang": "en", "value": "CWE-942"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.52.1,2.52.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "fiber", "source": "cna", "vendor": "gofiber"}, "product": "fiber", "vendor": "gofiber"}], "created": "2026-10-29T22:15:03.617023+00:00", "updated": "2026-10-29T22:45:03.508457+00:00", "vendors": ["gofiber", "gofiber$PRODUCT$fiber"]}