{"answers":{"affected":"5 open source packages ship an affected version, including github.com/gofiber/fiber/v3 and github.com/gofiber/fiber/v2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45045 in the wild and no public exploit code.","fix":"Upgrade github.com/gofiber/fiber/v3 to 3.3.0 or later.","what":"CVE-2026-45045 is a medium-severity vulnerability in gofiber fiber, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-45045 and fix it if it is affected.\n\nWhat it is: CVE-2026-45045 is a medium-severity vulnerability in gofiber fiber, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-45045 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.3.0\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.3.0\n- github.com/gofiber/fiber/v3 (Go): affected all versions; fixed in 3.3.0\n- github.com/gofiber/fiber/v2 (Go): affected all versions; fixed in 2.52.14\n- github.com/gofiber/fiber/v2 (Go): affected all versions; fixed in 2.52.14\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-45045/ (Markdown: https://insights.sbomify.com/CVE-2026-45045/index.md)","id":"CVE-2026-45045","markdown":"https://insights.sbomify.com/CVE-2026-45045/index.md","name":"CVE-2026-45045","record":{"aliases":["GHSA-gcfq-8gqf-4876","GO-2026-5887","MINI-5g7v-9g4p-6349","MINI-6r5m-9fvh-3mx8","MINI-7w8h-jr24-h956","MINI-8vvp-fqcg-3cqh","UBUNTU-CVE-2026-45045"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Go web framework","requires_auth":"none","summary":"Attackers can spoof X-Real-IP headers in Fiber proxy middleware, bypassing upstream rate limiting and access controls.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fiber","vendor":"gofiber"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Fiber: X-Real-IP Spoofing via Header.Add() in BalancerForward","id":"CVE-2026-45045","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":5,"n_references":7,"next":{"headline":"Gryph Agents Payload Filter Fails to Strip Tool Payload for Sensitive Content","id":"CVE-2026-45046"},"packages":[{"ecosystem":"Go","fixed":["2.52.14"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":null,"source":"GHSA-gcfq-8gqf-4876"},{"ecosystem":"Go","fixed":["2.52.14"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":"pkg:golang/github.com/gofiber/fiber/v2","source":"GHSA-gcfq-8gqf-4876"},{"ecosystem":"Go","fixed":["3.3.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":null,"source":"GHSA-gcfq-8gqf-4876"},{"ecosystem":"Go","fixed":["3.3.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","source":"GHSA-gcfq-8gqf-4876"},{"ecosystem":"Go","fixed":["3.3.0"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v3","purl":"pkg:golang/github.com/gofiber/fiber/v3","source":"GO-2026-5887"}],"prev":{"headline":"RustFS: Authentication bypass in /profile/cpu and /profile/memory allows unauthenticated access to profiling handlers","id":"CVE-2026-45044"},"products":["fiber"],"published":"2026-07-08","related":[{"cvss_score":10,"headline":"Fiber Session Middleware Token Injection Vulnerability","id":"CVE-2024-38513","kev_date_added":null,"published":"2024-07-01"},{"cvss_score":10,"headline":"CSRF Token Reuse Vulnerability in fiber","id":"CVE-2023-45128","kev_date_added":null,"published":"2023-10-16"},{"cvss_score":9.4,"headline":"Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials","id":"CVE-2024-25124","kev_date_added":null,"published":"2024-02-21"},{"cvss_score":9.2,"headline":"Fiber insecurely fallsback in utils.UUIDv4() / utils.UUID() — predictable / zero‑UUID on crypto/rand failure","id":"CVE-2025-66630","kev_date_added":null,"published":"2026-02-09"},{"cvss_score":8.7,"headline":"Fiber Susceptible to Crash via `BodyParser` Due to Unvalidated Large Slice Index in Decoder","id":"CVE-2025-54801","kev_date_added":null,"published":"2025-08-05"},{"cvss_score":8.6,"headline":"CSRF Token Validation Vulnerability in fiber","id":"CVE-2023-45141","kev_date_added":null,"published":"2023-10-16"},{"cvss_score":7.7,"headline":"Fiber has an Arbitrary File Read in Static Middleware on Windows","id":"CVE-2026-25891","kev_date_added":null,"published":"2026-02-24"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-09","vendors":["gofiber"]},"summary":"Attackers can spoof X-Real-IP headers in Fiber proxy middleware, bypassing upstream rate limiting and access controls.","url":"https://insights.sbomify.com/CVE-2026-45045/"}