{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-84962 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-84962 is a medium-severity vulnerability in MongoDB libmongocrypt, published on 3 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-84962 and fix it if it is affected.\n\nWhat it is: CVE-2026-84962 is a medium-severity vulnerability in MongoDB libmongocrypt, published on 3 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-84962 in the wild and no public exploit code.\n\nAffected product: MongoDB libmongocrypt. 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-2026-84962/ (Markdown: https://insights.sbomify.com/CVE-2026-84962/index.md)","id":"CVE-2026-84962","markdown":"https://insights.sbomify.com/CVE-2026-84962/index.md","name":"CVE-2026-84962","record":{"aliases":["DEBIAN-CVE-2026-84962","UBUNTU-CVE-2026-84962"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["privilege_escalation","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"MongoDB encryption library","requires_auth":"high_privilege","summary":"An attacker with write access can inject CRLF into key identifiers to force authenticated KMS API calls, escalating privileges and bypassing client-side encryption.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mongodb","cpe":[{"product":"libmongocrypt","vendor":"mongodb"}],"cvss":{"score":5.7,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-93","name":"Improper Neutralization of CRLF Sequences"}],"description":"An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.","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":"Authenticated KMS request forgery via CRLF injection in GCP key identifier strings","id":"CVE-2026-84962","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser","id":"CVE-2026-84963"},"packages":[],"prev":{"headline":"undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool","id":"CVE-2026-84961"},"products":["libmongocrypt"],"published":"2026-09-03","related":[{"cvss_score":8.7,"headline":"Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt","id":"CVE-2026-106433","kev_date_added":null,"published":"2026-10-08"},{"cvss_score":7.1,"headline":"Persistent client crash loop via undersized FLE2 insert-update ciphertext in decryption path","id":"CVE-2026-84971","kev_date_added":null,"published":"2026-09-03"},{"cvss_score":2,"headline":"Cross-tenant database retargeting via dot/NUL injection in namespace strings in libmongocrypt","id":"CVE-2026-81523","kev_date_added":null,"published":"2026-08-27"}],"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":"An attacker with write access can inject CRLF into key identifiers to force authenticated KMS API calls, escalating privileges and bypassing client-side encryption.","url":"https://insights.sbomify.com/CVE-2026-84962/"}