{"answers":{"affected":"2 open source packages ship an affected version, including pymongo. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-106435 in the wild and no public exploit code.","fix":"Upgrade pymongo to 4.18.3 or later.","what":"CVE-2026-106435 is a medium-severity denial of service vulnerability in MongoDB Python Driver, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-106435 and fix it if it is affected.\n\nWhat it is: CVE-2026-106435 is a medium-severity denial of service vulnerability in MongoDB Python Driver, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-106435 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- pymongo (PyPI): affected from 3.9.0; fixed in 4.18.3\n- pymongo (PyPI): affected from 3.9.0; fixed in 4.18.3\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-2026-106435/ (Markdown: https://insights.sbomify.com/CVE-2026-106435/index.md)","id":"CVE-2026-106435","markdown":"https://insights.sbomify.com/CVE-2026-106435/index.md","name":"CVE-2026-106435","record":{"aliases":["AZL-107129","DEBIAN-CVE-2026-106435","ECHO-0def-1f54-e1ea","GHSA-98qm-wvgf-w4cf","MINI-8jph-pcjp-cf84","UBUNTU-CVE-2026-106435"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"MongoDB Python Driver","requires_auth":"none","summary":"An attacker supplying malformed BSON to the MongoDB Python Driver's decode API can cause a denial of service via out-of-bounds read when the C extension is loaded.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mongodb","cpe":[{"product":"python_driver","vendor":"mongodb"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/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-125","name":"Out-of-bounds Read"}],"description":"The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.","ecosystems":["PyPI"],"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":"Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver","id":"CVE-2026-106435","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver","id":"CVE-2026-106436"},"packages":[{"ecosystem":"PyPI","fixed":["4.18.3"],"introduced":["3.9.0"],"last_affected":[],"package":"pymongo","purl":null,"source":"GHSA-98qm-wvgf-w4cf"},{"ecosystem":"PyPI","fixed":["4.18.3"],"introduced":["3.9.0"],"last_affected":[],"package":"pymongo","purl":"pkg:pypi/pymongo","source":"GHSA-98qm-wvgf-w4cf"}],"prev":{"headline":"Unrecognized payload acceptance in explicit decryption in MongoDB libmongocrypt","id":"CVE-2026-106434"},"products":["Python Driver"],"published":"2026-10-08","related":[{"cvss_score":6.1,"headline":"GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB Python Driver","id":"CVE-2026-88029","kev_date_added":null,"published":"2026-09-10"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"2026-10-09","vendors":["MongoDB"]},"summary":"An attacker supplying malformed BSON to the MongoDB Python Driver's decode API can cause a denial of service via out-of-bounds read when the C extension is loaded.","url":"https://insights.sbomify.com/CVE-2026-106435/"}