{"answers":{"affected":"3 open source packages ship an affected version, including github.com/slackhq/nebula.","exploited":"There is no known exploitation of CVE-2025-62820 in the wild and no public exploit code.","fix":"Upgrade github.com/slackhq/nebula to 1.9.7 or later.","what":"CVE-2025-62820 is a medium-severity authentication bypass vulnerability in Slack Nebula, published on 23 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-62820 and fix it if it is affected.\n\nWhat it is: CVE-2025-62820 is a medium-severity authentication bypass vulnerability in Slack Nebula, published on 23 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-62820 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/slackhq/nebula (Go): affected from 1.9.4; fixed in 1.9.7\n- github.com/slackhq/nebula (Go): affected from 1.9.4; fixed in 1.9.7\n- github.com/slackhq/nebula (Go): affected from 1.9.4; fixed in 1.9.7\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-2025-62820/ (Markdown: https://insights.sbomify.com/CVE-2025-62820/index.md)","id":"CVE-2025-62820","markdown":"https://insights.sbomify.com/CVE-2025-62820/index.md","name":"CVE-2025-62820","record":{"aliases":["CLEANSTART-2026-KX60703","CLEANSTART-2026-PQ02087","CLEANSTART-2026-ZK17836","GHSA-x6fh-7qmf-69xh","GO-2025-4068","MINI-cw98-4w4w-c78v"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Nebula overlay network","requires_auth":"low_privilege","summary":"Slack Nebula mishandles CIDR configurations, allowing attackers to bypass source IP restrictions and access the network.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":4.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-420","name":"Unprotected Alternate Channel"}],"description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","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":"Slack Nebula may accept arbitrary source IP addresses","id":"CVE-2025-62820","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2025"},"n_packages":3,"n_references":2,"next":{"headline":"Memory corruption in n/a","id":"CVE-2025-62821"},"packages":[{"ecosystem":"Go","fixed":["1.9.7"],"introduced":["1.9.4"],"last_affected":[],"package":"github.com/slackhq/nebula","purl":null,"source":"GHSA-x6fh-7qmf-69xh"},{"ecosystem":"Go","fixed":["1.9.7"],"introduced":["1.9.4"],"last_affected":[],"package":"github.com/slackhq/nebula","purl":"pkg:golang/github.com/slackhq/nebula","source":"GHSA-x6fh-7qmf-69xh"},{"ecosystem":"Go","fixed":["1.9.7"],"introduced":["1.9.4"],"last_affected":[],"package":"github.com/slackhq/nebula","purl":"pkg:golang/github.com/slackhq/nebula","source":"GO-2025-4068"}],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2025-62818"},"products":["Nebula"],"published":"2025-10-23","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":"2025-10-23","vendors":["Slack"]},"summary":"Slack Nebula mishandles CIDR configurations, allowing attackers to bypass source IP restrictions and access the network.","url":"https://insights.sbomify.com/CVE-2025-62820/"}