{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100678 exists.","fix":"No fix has been published for CVE-2026-100678 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100678 is a high-severity authentication bypass vulnerability in stoatchat, published on 26 Sep 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-2026-100678 and fix it if it is affected.\n\nWhat it is: CVE-2026-100678 is a high-severity authentication bypass vulnerability in stoatchat, published on 26 Sep 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-2026-100678 exists.\n\nAffected product: stoatchat. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-100678/ (Markdown: https://insights.sbomify.com/CVE-2026-100678/index.md)","id":"CVE-2026-100678","markdown":"https://insights.sbomify.com/CVE-2026-100678/index.md","name":"CVE-2026-100678","record":{"aliases":["GHSA-6877-g673-f5r8","GHSA-qgwf-mjq4-r7pg"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"stoatchat","requires_auth":"none","summary":"Attackers can bypass MFA by brute-forcing TOTP codes due to insufficient rate limiting, leading to account takeover.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-307","name":"Improper Restriction of Excessive Authentication Attempts"}],"description":"stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting","id":"CVE-2026-100678","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket","id":"CVE-2026-100679"},"packages":[],"prev":{"headline":"stoatchat before 0.15.5 Account Enumeration via Error Location","id":"CVE-2026-100677"},"products":["stoatchat"],"published":"2026-09-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-09-30","vendors":["stoatchat"]},"summary":"Attackers can bypass MFA by brute-forcing TOTP codes due to insufficient rate limiting, leading to account takeover.","url":"https://insights.sbomify.com/CVE-2026-100678/"}