{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-33630 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-33630 is a high-severity use after free vulnerability in c-ares, published on 3 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-2026-33630 and fix it if it is affected.\n\nWhat it is: CVE-2026-33630 is a high-severity use after free vulnerability in c-ares, published on 3 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-2026-33630 in the wild and no public exploit code.\n\nAffected product: c-ares. 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-2026-33630/ (Markdown: https://insights.sbomify.com/CVE-2026-33630/index.md)","id":"CVE-2026-33630","markdown":"https://insights.sbomify.com/CVE-2026-33630/index.md","name":"CVE-2026-33630","record":{"aliases":["ALPINE-CVE-2026-33630","ALSA-2026:42096","AZL-99093","AZL-99095","BELL-CVE-2026-33630","DEBIAN-CVE-2026-33630","ECHO-3b80-9e26-3298","GHSA-6wfj-rwm7-3542","MINI-v7pm-5956-rc34","RHSA-2026:36192","RHSA-2026:42096","RLSA-2026:42096","ROOT-OS-ALPINE-320-CVE-2026-33630","UBUNTU-CVE-2026-33630","USN-8844-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"c-ares resolver library","requires_auth":"none","summary":"A use-after-free in c-ares allows remote attackers to execute code or cause denial of service via TCP queries.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-415","name":"Double Free"}],"description":"c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.","ecosystems":["AlmaLinux:10","Red Hat:enterprise_linux:10.2","Red Hat:hummingbird:1","Rocky Linux:10"],"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":"Use after free in c-ares","id":"CVE-2026-33630","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":9,"n_references":5,"next":{"headline":"ClearanceKit: opfilter policy bypass via non-open file operations","id":"CVE-2026-33631"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares","purl":"pkg:rpm/almalinux/c-ares","source":"ALSA-2026:42096"},{"ecosystem":"AlmaLinux:10","fixed":["1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares-devel","purl":"pkg:rpm/almalinux/c-ares-devel","source":"ALSA-2026:42096"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares","purl":"pkg:rpm/redhat/c-ares","source":"RHSA-2026:42096"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares-debuginfo","purl":"pkg:rpm/redhat/c-ares-debuginfo","source":"RHSA-2026:42096"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares-debugsource","purl":"pkg:rpm/redhat/c-ares-debugsource","source":"RHSA-2026:42096"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares-devel","purl":"pkg:rpm/redhat/c-ares-devel","source":"RHSA-2026:42096"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.34.7-1.hum1"],"introduced":["0"],"last_affected":[],"package":"c-ares","purl":"pkg:rpm/redhat/c-ares","source":"RHSA-2026:36192"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:1.34.7-1.hum1"],"introduced":["0"],"last_affected":[],"package":"c-ares-devel","purl":"pkg:rpm/redhat/c-ares-devel","source":"RHSA-2026:36192"},{"ecosystem":"Rocky Linux:10","fixed":["0:1.34.6-2.el10_2"],"introduced":["0"],"last_affected":[],"package":"c-ares","purl":"pkg:rpm/rocky-linux/c-ares?distro=rocky-linux-10\u0026epoch=0","source":"RLSA-2026:42096"}],"prev":{"headline":"Invoice Ninja Denylist Bypass may Lead to Stored XSS via Invoice Line Items","id":"CVE-2026-33628"},"products":["c-ares"],"published":"2026-09-03","related":[],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-05","vendors":["c-ares"]},"summary":"A use-after-free in c-ares allows remote attackers to execute code or cause denial of service via TCP queries.","url":"https://insights.sbomify.com/CVE-2026-33630/"}