Fiber: CORS wildcard origins matched without a dot boundary, allowing credentialed cross-origin reads

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-119285 · CVE overview and exploitation status

EUVD-2026-113402

GHSA-g5jq-qmqr-qrwf

GO-2026-6896

cve-program · CVE-2026-119285

• https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf
• https://github.com/gofiber/fiber/pull/2915
• https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b
• https://github.com/gofiber/fiber/releases/tag/v2.52.3

euvd · EUVD-2026-113402

• https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf
• https://github.com/gofiber/fiber/pull/2915
• https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b
• https://github.com/gofiber/fiber/releases/tag/v2.52.3

nvd · CVE-2026-119285

• https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b
• https://github.com/gofiber/fiber/pull/2915
• https://github.com/gofiber/fiber/releases/tag/v2.52.3
• https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf

osv · GHSA-g5jq-qmqr-qrwf

• https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf
• https://nvd.nist.gov/vuln/detail/CVE-2026-119285
• https://github.com/gofiber/fiber/pull/2915
• https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b
• https://github.com/gofiber/fiber
• https://github.com/gofiber/fiber/releases/tag/v2.52.3

osv · GO-2026-6896

• https://github.com/gofiber/fiber/security/advisories/GHSA-g5jq-qmqr-qrwf
• https://nvd.nist.gov/vuln/detail/CVE-2026-119285
• https://github.com/gofiber/fiber/commit/1aac6f618b6bd3e159d2449acb4232a2170b976b
• https://github.com/gofiber/fiber/pull/2915
• https://github.com/gofiber/fiber/releases/tag/v2.52.3

• Fiber: CORS wildcard origins matched without a dot boundary, allowing credentialed cross-origin reads in github.com/gofiber/fiber · Newly collected advisory · 5 Nov 2026
• Fiber: CORS wildcard origins matched without a dot boundary, allowing credentialed cross-origin reads · Advisory content revised · 5 Nov 2026
• 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 bo… · Advisory content revised · 2 Nov 2026
• Fiber: CORS wildcard origins matched without a dot boundary, allowing credentialed cross-origin reads · Newly collected advisory · 30 Oct 2026