{"answers":{"affected":"4 open source packages ship an affected version, including axios.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101909 exists.","fix":"Upgrade axios to a fixed version for your release line: 0.34.0 or 1.20.0.","what":"CVE-2026-101909 is a high-severity unsafe deserialization vulnerability in axios, published on 28 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-2026-101909 and fix it if it is affected.\n\nWhat it is: CVE-2026-101909 is a high-severity unsafe deserialization vulnerability in axios, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101909 exists.\n\nAffected packages and fixed versions:\n- axios (npm): affected from 0.28.0; fixed in 0.34.0\n- axios (npm): affected from 0.28.0; fixed in 0.34.0\n- axios (npm): affected from 1.15.1; fixed in 1.20.0\n- axios (npm): affected from 1.15.1; fixed in 1.20.0\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-2026-101909/ (Markdown: https://insights.sbomify.com/CVE-2026-101909/index.md)","id":"CVE-2026-101909","markdown":"https://insights.sbomify.com/CVE-2026-101909/index.md","name":"CVE-2026-101909","record":{"aliases":["CLEANSTART-2026-AQ06052","CLEANSTART-2026-MT76481","CLEANSTART-2026-OW20688","DEBIAN-CVE-2026-101909","ECHO-c7a0-be1c-dfd7","GHSA-x97p-jq2g-jp4f","MINI-59v7-6q9p-9w7x","MINI-6c8p-h274-3w2f","MINI-73cg-x4fr-7qvw","MINI-95wx-8726-x6gv","MINI-c26q-m275-2r8g","MINI-cmh5-w69f-7g9c","MINI-fr27-8967-93wq","MINI-fwph-jp2c-698j","MINI-h3m9-vj45-5f7x","MINI-w72g-g5v9-2598","MINI-x6hx-gxpv-hc7c","ROOT-APP-NPM-CVE-2026-101909","UBUNTU-CVE-2026-101909"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript HTTP client","requires_auth":"none","summary":"Prototype pollution in Axios toFormData allows attackers to alter serialization, cause denial of service, or execute code if function injection is possible.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"Axios is a promise-based HTTP client for the browser and Node.js. From 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0, ToFormData processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function. Serialized field naming and data interpretation can change, maxDepth can cause request failure, Blob can alter value handling, and a polluted visitor can execute under the stronger function-injection primitive. This issue is fixed in versions 0.34.0 and 1.20.0.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Axios: Prototype Pollution Gadget in axios toFormData Options","id":"CVE-2026-101909","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":4,"n_references":6,"next":{"headline":"ip-address: no classifier recognizes the NAT64 local-use range 64:ff9b:1::/48, allowing SSRF and trust-boundary bypass","id":"CVE-2026-101910"},"packages":[{"ecosystem":"npm","fixed":["0.34.0"],"introduced":["0.28.0"],"last_affected":[],"package":"axios","purl":null,"source":"GHSA-x97p-jq2g-jp4f"},{"ecosystem":"npm","fixed":["0.34.0"],"introduced":["0.28.0"],"last_affected":[],"package":"axios","purl":"pkg:npm/axios","source":"GHSA-x97p-jq2g-jp4f"},{"ecosystem":"npm","fixed":["1.20.0"],"introduced":["1.15.1"],"last_affected":[],"package":"axios","purl":null,"source":"GHSA-x97p-jq2g-jp4f"},{"ecosystem":"npm","fixed":["1.20.0"],"introduced":["1.15.1"],"last_affected":[],"package":"axios","purl":"pkg:npm/axios","source":"GHSA-x97p-jq2g-jp4f"}],"prev":{"headline":"Axios: Prototype pollution gadget in fetch adapter can alter outbound requests","id":"CVE-2026-101908"},"products":["axios"],"published":"2026-09-28","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["axios"]},"summary":"Prototype pollution in Axios toFormData allows attackers to alter serialization, cause denial of service, or execute code if function injection is possible.","url":"https://insights.sbomify.com/CVE-2026-101909/"}