{"answers":{"affected":"4 open source packages ship an affected version, including github.com/gofiber/fiber/v2 and github.com/gofiber/fiber. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-66630 in the wild and no public exploit code.","fix":"Upgrade github.com/gofiber/fiber/v2 to 2.52.11 or later.","what":"CVE-2025-66630 is a critical vulnerability in gofiber fiber, published on 9 Feb 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-2025-66630 and fix it if it is affected.\n\nWhat it is: CVE-2025-66630 is a critical vulnerability in gofiber fiber, published on 9 Feb 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-2025-66630 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/gofiber/fiber/v2 (Go): affected all versions; fixed in 2.52.11\n- github.com/gofiber/fiber/v2 (Go): affected all versions; fixed in 2.52.11\n- github.com/gofiber/fiber/v2 (Go): affected all versions; fixed in 2.52.11\n- github.com/gofiber/fiber (Go): affected all versions; no fix listed\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-2025-66630/ (Markdown: https://insights.sbomify.com/CVE-2025-66630/index.md)","id":"CVE-2025-66630","markdown":"https://insights.sbomify.com/CVE-2025-66630/index.md","name":"CVE-2025-66630","record":{"aliases":["GHSA-68rr-p4fp-j59v","GO-2026-4471"],"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":"Fiber generates predictable UUIDs when crypto/rand fails, potentially allowing attackers to bypass session, CSRF, or rate-limiting protections.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fiber","vendor":"gofiber"}],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"}],"description":"Fiber is an Express inspired web framework written in Go. Before 2.52.11, on Go versions prior to 1.24, the underlying crypto/rand implementation can return an error if secure randomness cannot be obtained. Because no error is returned by the Fiber v2 UUID functions, application code may unknowingly rely on predictable, repeated, or low-entropy identifiers in security-critical pathways. This is especially impactful because many Fiber v2 middleware components (session middleware, CSRF, rate limiting, request-ID generation, etc.) default to using utils.UUIDv4(). This vulnerability is fixed in 2.52.11.","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 insecurely fallsback in utils.UUIDv4() / utils.UUID() — predictable / zero‑UUID on crypto/rand failure","id":"CVE-2025-66630","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"weak_cryptography","year":"2025"},"n_packages":4,"n_references":3,"next":{"headline":"CSLA .NET is vulnerable to Remote Code Execution via WcfProxy","id":"CVE-2025-66631"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber","purl":"pkg:golang/github.com/gofiber/fiber","source":"GO-2026-4471"},{"ecosystem":"Go","fixed":["2.52.11"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":null,"source":"GHSA-68rr-p4fp-j59v"},{"ecosystem":"Go","fixed":["2.52.11"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":"pkg:golang/github.com/gofiber/fiber/v2","source":"GHSA-68rr-p4fp-j59v"},{"ecosystem":"Go","fixed":["2.52.11"],"introduced":["0"],"last_affected":[],"package":"github.com/gofiber/fiber/v2","purl":"pkg:golang/github.com/gofiber/fiber/v2","source":"GO-2026-4471"}],"prev":{"headline":"HedgeDoc is missing state parameter in OAuth2 flows could lead to CSRF","id":"CVE-2025-66629"},"products":["fiber"],"published":"2026-02-09","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":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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-10","vendors":["gofiber"]},"summary":"Fiber generates predictable UUIDs when crypto/rand fails, potentially allowing attackers to bypass session, CSRF, or rate-limiting protections.","url":"https://insights.sbomify.com/CVE-2025-66630/"}