{"answers":{"affected":"3 open source packages ship an affected version, including github.com/juev/nebula-mesh.","exploited":"There is no known exploitation of CVE-2026-47723 in the wild and no public exploit code.","fix":"Upgrade github.com/juev/nebula-mesh to 0.3.1 or later.","what":"CVE-2026-47723 is a high-severity vulnerability in juev nebula-mesh, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-47723 and fix it if it is affected.\n\nWhat it is: CVE-2026-47723 is a high-severity vulnerability in juev nebula-mesh, published on 23 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-47723 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/juev/nebula-mesh (Go): affected all versions; fixed in 0.3.1\n- github.com/juev/nebula-mesh (Go): affected all versions; fixed in 0.3.1\n- github.com/juev/nebula-mesh (Go): affected all versions; fixed in 0.3.1\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-2026-47723/ (Markdown: https://insights.sbomify.com/CVE-2026-47723/index.md)","id":"CVE-2026-47723","markdown":"https://insights.sbomify.com/CVE-2026-47723/index.md","name":"CVE-2026-47723","record":{"aliases":["GHSA-w7w5-5gcp-38rw","GO-2026-5698"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Nebula mesh control plane","requires_auth":"none","summary":"The nebula-mesh control plane fails to set standard browser security headers, potentially allowing clickjacking or MIME sniffing attacks.","user_interaction":"required","vuln_class":"misconfiguration"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1021","name":"Improper Restriction of Rendered UI Layers or Frames"}],"description":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.1, none of the response paths in `internal/web/` or `internal/api/` set the standard browser-security headers. `grep` for `Content-Security-Policy`, `X-Frame-Options`, `Strict-Transport-Security`, `X-Content-Type-Options`, `Referrer-Policy` returns zero matches across the codebase. Version 0.3.1 fixes the issue.","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":"nebula-mesh: Web UI and API responses lack security headers (CSP, X-Frame-Options, HSTS, etc.)","id":"CVE-2026-47723","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"misconfiguration","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"nebula-mesh: API endpoints lack ownership checks, enabling cross-operator privilege escalation","id":"CVE-2026-47724"},"packages":[{"ecosystem":"Go","fixed":["0.3.1"],"introduced":["0"],"last_affected":[],"package":"github.com/juev/nebula-mesh","purl":null,"source":"GHSA-w7w5-5gcp-38rw"},{"ecosystem":"Go","fixed":["0.3.1"],"introduced":["0"],"last_affected":[],"package":"github.com/juev/nebula-mesh","purl":"pkg:golang/github.com/juev/nebula-mesh","source":"GHSA-w7w5-5gcp-38rw"},{"ecosystem":"Go","fixed":["0.3.1"],"introduced":["0"],"last_affected":[],"package":"github.com/juev/nebula-mesh","purl":"pkg:golang/github.com/juev/nebula-mesh","source":"GO-2026-5698"}],"prev":{"headline":"nebula-mesh: Host advanced overrides allow YAML injection into agent config.yml","id":"CVE-2026-47722"},"products":["nebula-mesh"],"published":"2026-07-23","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":"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":"2026-07-24","vendors":["juev"]},"summary":"The nebula-mesh control plane fails to set standard browser security headers, potentially allowing clickjacking or MIME sniffing attacks.","url":"https://insights.sbomify.com/CVE-2026-47723/"}