{"answers":{"affected":"1 open source package ship an affected version, including ash_authentication_oauth2_server.","exploited":"There is no known exploitation of CVE-2026-82753 in the wild and no public exploit code.","fix":"Upgrade ash_authentication_oauth2_server to 0.3.1 or later.","what":"CVE-2026-82753 is a high-severity denial of service vulnerability in ash-project ash_authentication_oauth2_server, published on 7 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-2026-82753 and fix it if it is affected.\n\nWhat it is: CVE-2026-82753 is a high-severity denial of service vulnerability in ash-project ash_authentication_oauth2_server, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-82753 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ash_authentication_oauth2_server (Hex): affected from 0.3.0; 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-2026-82753/ (Markdown: https://insights.sbomify.com/CVE-2026-82753/index.md)","id":"CVE-2026-82753","markdown":"https://insights.sbomify.com/CVE-2026-82753/index.md","name":"CVE-2026-82753","record":{"aliases":["EEF-CVE-2026-82753","GHSA-9pv3-wxjm-f846"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Elixir OAuth2 library","requires_auth":"none","summary":"Unauthenticated attackers can exhaust database and memory resources by creating unlimited client rows via the authorize endpoint when CIMD is enabled.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to exhaust database storage and memory.\n\nThe /authorize endpoint is unauthenticated by design. With Client ID Metadata Documents enabled, resolve_client/3 in AshAuthentication.Oauth2Server.CIMD fetches the document for each new URL-shaped client_id and upserts a client row, with no cap on the number of rows, no expiry or garbage collection, and no length bound on the fetched fields; the document was also placed in CIMD.Cache before validation, so even rejected documents held cache memory until their TTL. An attacker serving valid documents at many distinct URLs creates one permanent client row per URL, each able to carry multi-megabyte strings, growing storage and memory without bound.\n\nThis issue affects ash_authentication_oauth2_server: from 0.3.0 before 0.3.1.","ecosystems":["Hex"],"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":"Denial of service in ash authentication oauth2 server","id":"CVE-2026-82753","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":4,"next":{"headline":"ash_authentication_oauth2_server aliases every protocol endpoint under /.well-known, bypassing path-scoped controls","id":"CVE-2026-82754"},"packages":[{"ecosystem":"Hex","fixed":["0.3.1"],"introduced":["0.3.0"],"last_affected":[],"package":"ash_authentication_oauth2_server","purl":"pkg:hex/ash_authentication_oauth2_server","source":"EEF-CVE-2026-82753"}],"prev":{"headline":"Ash string length constraints count graphemes, so a combining-mark string of any size passes max_length","id":"CVE-2026-82752"},"products":["ash_authentication_oauth2_server"],"published":"2026-09-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"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":"2026-09-08","vendors":["ash-project"]},"summary":"Unauthenticated attackers can exhaust database and memory resources by creating unlimited client rows via the authorize endpoint when CIMD is enabled.","url":"https://insights.sbomify.com/CVE-2026-82753/"}