{"answers":{"affected":"3 open source packages ship an affected version, including github.com/lin-snow/ech0.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79664 exists.","fix":"Upgrade github.com/lin-snow/ech0 to 1.4.8-0.20260503041146-eab62379c795 or later.","what":"CVE-2026-79664 is a critical vulnerability in lin-snow Ech0, published on 25 Aug 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-2026-79664 and fix it if it is affected.\n\nWhat it is: CVE-2026-79664 is a critical vulnerability in lin-snow Ech0, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79664 exists.\n\nAffected packages and fixed versions:\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503041146-eab62379c795\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503041146-eab62379c795\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260503041146-eab62379c795\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-2026-79664/ (Markdown: https://insights.sbomify.com/CVE-2026-79664/index.md)","id":"CVE-2026-79664","markdown":"https://insights.sbomify.com/CVE-2026-79664/index.md","name":"CVE-2026-79664","record":{"aliases":["GHSA-3r5q-vfpj-wprr","GHSA-fpw6-hrg5-q5x5","GO-2026-5375"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["account_takeover","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Go authentication library","requires_auth":"none","summary":"Attackers with stolen never-expire tokens maintain perpetual access because Ech0 fails to revoke them via logout, API, or admin actions.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-613","name":"DEPRECATED: Insufficient Session Expiration"}],"description":"Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Ech0 before 4.7.3 Access Token Revocation Bypass","id":"CVE-2026-79664","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Ech0 before 4.5.1 Authorization Bypass via Session Tokens","id":"CVE-2026-79665"},"packages":[{"ecosystem":"Go","fixed":["1.4.8-0.20260503041146-eab62379c795"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":null,"source":"GHSA-fpw6-hrg5-q5x5"},{"ecosystem":"Go","fixed":["1.4.8-0.20260503041146-eab62379c795"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","source":"GHSA-fpw6-hrg5-q5x5"},{"ecosystem":"Go","fixed":["1.4.8-0.20260503041146-eab62379c795"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","source":"GO-2026-5375"}],"prev":{"headline":"Ech0 before 4.7.3 Stored XSS via RSS feed tag names","id":"CVE-2026-79663"},"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["lin-snow"]},"summary":"Attackers with stolen never-expire tokens maintain perpetual access because Ech0 fails to revoke them via logout, API, or admin actions.","url":"https://insights.sbomify.com/CVE-2026-79664/"}