{"answers":{"affected":"3 open source packages ship an affected version, including github.com/tinfoil-factory/netfoil.","exploited":"There is no known exploitation of GHSA-xvg2-cgv6-6h7v in the wild and no public exploit code.","fix":"Upgrade github.com/tinfoil-factory/netfoil to 0.4.0 or later.","what":"GHSA-xvg2-cgv6-6h7v is a vulnerability in github.com/tinfoil-factory/netfoil, published on 29 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 GHSA-xvg2-cgv6-6h7v and fix it if it is affected.\n\nWhat it is: GHSA-xvg2-cgv6-6h7v is a vulnerability in github.com/tinfoil-factory/netfoil, published on 29 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 GHSA-xvg2-cgv6-6h7v in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/tinfoil-factory/netfoil (Go): affected all versions; fixed in 0.4.0\n- github.com/tinfoil-factory/netfoil (Go): affected all versions; fixed in 0.4.0\n- github.com/tinfoil-factory/netfoil (Go): affected all versions; fixed in 0.4.0\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/GHSA-xvg2-cgv6-6h7v/ (Markdown: https://insights.sbomify.com/GHSA-xvg2-cgv6-6h7v/index.md)","id":"GHSA-xvg2-cgv6-6h7v","markdown":"https://insights.sbomify.com/GHSA-xvg2-cgv6-6h7v/index.md","name":"GHSA-xvg2-cgv6-6h7v","record":{"aliases":["GO-2026-6143"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Go DNS blocking library","requires_auth":"none","summary":"Incorrect DNS block responses allow traffic to reach localhost instead of being dropped, bypassing intended blocking mechanisms.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"### Summary\n`0.0.0.0` was used instead of NXDOMAIN for block responses. On Linux, which is the target platform for netfoil, the `0.0.0.0` is sent to localhost rather than just dropped.\n\n### Impact\nUnintended traffic could be sent to localhost. Impact depends on running services and firewall rules.","ecosystems":["Go"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":true,"headline":"netfoil: Incorrect block responses could lead to localhost traffic","id":"GHSA-xvg2-cgv6-6h7v","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":null,"packages":[{"ecosystem":"Go","fixed":["0.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/tinfoil-factory/netfoil","purl":null,"source":"GHSA-xvg2-cgv6-6h7v"},{"ecosystem":"Go","fixed":["0.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/tinfoil-factory/netfoil","purl":"pkg:golang/github.com/tinfoil-factory/netfoil","source":"GHSA-xvg2-cgv6-6h7v"},{"ecosystem":"Go","fixed":["0.4.0"],"introduced":["0"],"last_affected":[],"package":"github.com/tinfoil-factory/netfoil","purl":"pkg:golang/github.com/tinfoil-factory/netfoil","source":"GO-2026-6143"}],"products":null,"published":"2026-07-29","related":[],"sources":[{"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"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"Incorrect DNS block responses allow traffic to reach localhost instead of being dropped, bypassing intended blocking mechanisms.","url":"https://insights.sbomify.com/GHSA-xvg2-cgv6-6h7v/"}