{"answers":{"affected":"5 open source packages ship an affected version, including github.com/rs/cors and github.com/gofiber/fiber/v2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-20744 in the wild and no public exploit code.","fix":"Upgrade github.com/rs/cors to 1.5.0 or later.","what":"CVE-2018-20744 is a medium-severity vulnerability in n/a, published on 28 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-20744 and fix it if it is affected.\n\nWhat it is: CVE-2018-20744 is a medium-severity vulnerability in n/a, published on 28 Jan 2019. 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-2018-20744 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/rs/cors (Go): affected all versions; fixed in 1.5.0\n- github.com/rs/cors (Go): affected all versions; fixed in 1.5.0\n- github.com/rs/cors (Go): affected all versions; fixed in 1.5.0\n- github.com/gofiber/fiber/v2 (Go): affected from 2.0.0; fixed in 2.43.0\n- github.com/gofiber/fiber/v2 (Go): affected from 2.0.0; fixed in 2.43.0\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-2018-20744/ (Markdown: https://insights.sbomify.com/CVE-2018-20744/index.md)","id":"CVE-2018-20744","markdown":"https://insights.sbomify.com/CVE-2018-20744/index.md","name":"CVE-2018-20744","record":{"aliases":["GHSA-927h-x4qj-r242","GO-2023-1792"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Go CORS handler","requires_auth":"none","summary":"The Go CORS handler library incorrectly reflects arbitrary Origin headers when wildcard policies are used, allowing attackers to bypass CORS restrictions.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"go_cors","vendor":"go_cors_project"}],"cvss":{"score":5.9,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.0"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"}],"description":"The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.","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":"github.com/gofiber/fiber/v2 vulnerable to Origin Validation Error","id":"CVE-2018-20744","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2018"},"n_packages":5,"n_references":3,"next":{"headline":"Yii Incorrectly Implements CORS","id":"CVE-2018-20745"},"packages":[{"ecosystem":"Go","fixed":["2.43.0"],"introduced":["2.0.0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":null,"source":"GHSA-927h-x4qj-r242"},{"ecosystem":"Go","fixed":["2.43.0"],"introduced":["2.0.0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":"pkg:golang/github.com/gofiber/fiber/v2","source":"GHSA-927h-x4qj-r242"},{"ecosystem":"Go","fixed":["1.5.0"],"introduced":["0"],"last_affected":[],"package":"github.com/rs/cors","purl":null,"source":"GHSA-927h-x4qj-r242"},{"ecosystem":"Go","fixed":["1.5.0"],"introduced":["0"],"last_affected":[],"package":"github.com/rs/cors","purl":"pkg:golang/github.com/rs/cors","source":"GHSA-927h-x4qj-r242"},{"ecosystem":"Go","fixed":["1.5.0"],"introduced":["0"],"last_affected":[],"package":"github.com/rs/cors","purl":"pkg:golang/github.com/rs/cors","source":"GO-2023-1792"}],"prev":{"headline":"Denial of service in n/a","id":"CVE-2018-20743"},"products":["n/a"],"published":"2019-01-28","related":[],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["n/a"]},"summary":"The Go CORS handler library incorrectly reflects arbitrary Origin headers when wildcard policies are used, allowing attackers to bypass CORS restrictions.","url":"https://insights.sbomify.com/CVE-2018-20744/"}