{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-84964 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-84964 is a high-severity use after free vulnerability in MongoDB C Driver, 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-2026-84964 and fix it if it is affected.\n\nWhat it is: CVE-2026-84964 is a high-severity use after free vulnerability in MongoDB C Driver, 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-2026-84964 in the wild and no public exploit code.\n\nAffected product: MongoDB C Driver. 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-2026-84964/ (Markdown: https://insights.sbomify.com/CVE-2026-84964/index.md)","id":"CVE-2026-84964","markdown":"https://insights.sbomify.com/CVE-2026-84964/index.md","name":"CVE-2026-84964","record":{"aliases":["DEBIAN-CVE-2026-84964","UBUNTU-CVE-2026-84964"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"MongoDB C Driver","requires_auth":"none","summary":"A malicious trusted TLS endpoint can trigger a double free in the MongoDB C Driver, causing the client application to crash.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mongodb","cpe":[{"product":"c_driver","vendor":"mongodb"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-415","name":"Double Free"}],"description":"A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.","ecosystems":[],"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":"Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client","id":"CVE-2026-84964","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Heap write primitive via size round-up wrap during JSON parsing on 32-bit builds","id":"CVE-2026-84965"},"packages":[],"prev":{"headline":"Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser","id":"CVE-2026-84963"},"products":["C Driver"],"published":"2026-09-03","related":[{"cvss_score":9.2,"headline":"Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream","id":"CVE-2026-93393","kev_date_added":null,"published":"2026-09-17"},{"cvss_score":8.6,"headline":"MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow","id":"CVE-2026-6691","kev_date_added":null,"published":"2026-05-06"},{"cvss_score":7.3,"headline":"Accessing Untrusted Directory May Allow Local Privilege Escalation","id":"CVE-2024-7553","kev_date_added":null,"published":"2024-08-07"},{"cvss_score":6.9,"headline":"Integer Underflow → Heap Out-of-Bounds Read in `bson_new_from_buffer()","id":"CVE-2026-93395","kev_date_added":null,"published":"2026-09-17"},{"cvss_score":6.9,"headline":"Bulk write with options may read invalid memory","id":"CVE-2025-12119","kev_date_added":null,"published":"2025-11-18"},{"cvss_score":6.3,"headline":"libmongoc SCRAM client nonce-validation bypass","id":"CVE-2026-93394","kev_date_added":null,"published":"2026-09-17"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-09-03","vendors":["MongoDB"]},"summary":"A malicious trusted TLS endpoint can trigger a double free in the MongoDB C Driver, causing the client application to crash.","url":"https://insights.sbomify.com/CVE-2026-84964/"}