{"answers":{"affected":"3 open source packages ship an affected version, including github.com/lin-snow/Ech0 and github.com/lin-snow/ech0.","exploited":"There is no known exploitation of CVE-2026-79663 in the wild and no public exploit code.","fix":"Upgrade github.com/lin-snow/Ech0 to 1.4.8-0.20260503035519-fd320fe3e902 or later.","what":"CVE-2026-79663 is a medium-severity cross-site scripting vulnerability in lin-snow Ech0, published on 25 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-79663 and fix it if it is affected.\n\nWhat it is: CVE-2026-79663 is a medium-severity cross-site scripting vulnerability in lin-snow Ech0, published on 25 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-79663 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/lin-snow/Ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503035519-fd320fe3e902\n- github.com/lin-snow/Ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503035519-fd320fe3e902\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503035519-fd320fe3e902\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-2026-79663/ (Markdown: https://insights.sbomify.com/CVE-2026-79663/index.md)","id":"CVE-2026-79663","markdown":"https://insights.sbomify.com/CVE-2026-79663/index.md","name":"CVE-2026-79663","record":{"aliases":["GHSA-3v85-fqvh-7rxf","GHSA-9277-65xq-8gww","GO-2026-5100"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Ech0 blog platform","requires_auth":"high_privilege","summary":"Attackers with admin privileges can inject malicious scripts into RSS feed tag names, executing JavaScript in subscribers' RSS readers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.","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":"Ech0 before 4.7.3 Stored XSS via RSS feed tag names","id":"CVE-2026-79663","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Ech0 before 4.7.3 Access Token Revocation Bypass","id":"CVE-2026-79664"},"packages":[{"ecosystem":"Go","fixed":["1.4.8-0.20260503035519-fd320fe3e902"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/Ech0","purl":null,"source":"GHSA-3v85-fqvh-7rxf"},{"ecosystem":"Go","fixed":["1.4.8-0.20260503035519-fd320fe3e902"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/Ech0","purl":"pkg:golang/github.com/lin-snow/Ech0","source":"GHSA-3v85-fqvh-7rxf"},{"ecosystem":"Go","fixed":["1.4.8-0.20260503035519-fd320fe3e902"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","source":"GO-2026-5100"}],"prev":{"headline":"Ech0 before 4.7.3 OAuth Redirect URI Validation Bypass","id":"CVE-2026-79662"},"products":["Ech0"],"published":"2026-08-25","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":"2026-08-26","vendors":["lin-snow"]},"summary":"Attackers with admin privileges can inject malicious scripts into RSS feed tag names, executing JavaScript in subscribers' RSS readers.","url":"https://insights.sbomify.com/CVE-2026-79663/"}