{"answers":{"affected":"4 open source packages ship an affected version, including protobufjs. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44291 in the wild and no public exploit code.","fix":"Upgrade protobufjs to a fixed version for your release line: 7.5.6 or 8.0.2.","what":"CVE-2026-44291 is a high-severity code injection vulnerability in protobufjs protobuf.js, published on 13 May 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-2026-44291 and fix it if it is affected.\n\nWhat it is: CVE-2026-44291 is a high-severity code injection vulnerability in protobufjs protobuf.js, published on 13 May 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-2026-44291 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- protobufjs (npm): affected all versions; fixed in 7.5.6\n- protobufjs (npm): affected all versions; fixed in 7.5.6\n- protobufjs (npm): affected from 8.0.0; fixed in 8.0.2\n- protobufjs (npm): affected from 8.0.0; fixed in 8.0.2\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-2026-44291/ (Markdown: https://insights.sbomify.com/CVE-2026-44291/index.md)","id":"CVE-2026-44291","markdown":"https://insights.sbomify.com/CVE-2026-44291/index.md","name":"CVE-2026-44291","record":{"aliases":["CLEANSTART-2026-JH02542","CLEANSTART-2026-OR18491","CLEANSTART-2026-QG09459","ECHO-3792-9b0f-a42e","GHSA-75px-5xx7-5xc7","MINI-5f8r-wjwf-pvpg","MINI-5gwv-m53w-w2qx","MINI-6fvw-gp3g-gh7f","MINI-6jcx-hrj7-7r43","MINI-74r9-rm7m-6rxw","MINI-gwmp-5qmr-pmr3","MINI-h488-6jc3-m9cv","MINI-h6fh-hj2w-8hvg","MINI-mvv3-jggm-jw96","MINI-q3xr-9fmh-m4j5","MINI-q6hf-p5h6-h95w","MINI-qp64-rrjq-xf58","MINI-qpvw-92fv-4qw8","MINI-wgwh-c67p-6wfv","MINI-wrp3-9rq7-px7c","MINI-x9h3-cq37-pw4c","ROOT-APP-NPM-CVE-2026-44291"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript protobuf library","requires_auth":"none","summary":"Attackers can execute arbitrary code via prototype pollution in protobufjs by injecting malicious strings into generated JavaScript functions.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"protobufjs","vendor":"protobufjs_project"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs used plain objects with inherited prototypes for internal type lookup tables used by generated encode and decode functions. If Object.prototype had already been polluted, those lookup tables could resolve attacker-controlled inherited properties as valid protobuf type information. This could cause attacker-controlled strings to be emitted into generated JavaScript code. This vulnerability is fixed in 7.5.6 and 8.0.2.","ecosystems":["npm"],"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":"protobufjs: Code generation gadget after prototype pollution","id":"CVE-2026-44291","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"protobufjs: Prototype injection in generated message constructors","id":"CVE-2026-44292"},"packages":[{"ecosystem":"npm","fixed":["7.5.6"],"introduced":["0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-75px-5xx7-5xc7"},{"ecosystem":"npm","fixed":["7.5.6"],"introduced":["0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-75px-5xx7-5xc7"},{"ecosystem":"npm","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":null,"source":"GHSA-75px-5xx7-5xc7"},{"ecosystem":"npm","fixed":["8.0.2"],"introduced":["8.0.0"],"last_affected":[],"package":"protobufjs","purl":"pkg:npm/protobufjs","source":"GHSA-75px-5xx7-5xc7"}],"prev":{"headline":"protobufjs: Process-wide denial of service through unsafe option paths","id":"CVE-2026-44290"},"products":["protobuf.js"],"published":"2026-05-13","related":[{"cvss_score":9.8,"headline":"protobufjs Prototype Pollution vulnerability","id":"CVE-2023-36665","kev_date_added":null,"published":"2023-07-05"},{"cvss_score":9.4,"headline":"protobufjs has an arbitrary code execution issue","id":"CVE-2026-41242","kev_date_added":null,"published":"2026-04-18"},{"cvss_score":8.2,"headline":"Prototype Pollution","id":"CVE-2022-25878","kev_date_added":null,"published":"2022-05-27"},{"cvss_score":7.7,"headline":"protobufjs: Code injection through bytes field defaults in generated toObject code","id":"CVE-2026-44293","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":7.5,"headline":"protobufjs: Denial of service through unbounded Any expansion during JSON conversion","id":"CVE-2026-48712","kev_date_added":null,"published":"2026-06-22"},{"cvss_score":7.5,"headline":"protobufjs: Denial of service through unbounded protobuf recursion","id":"CVE-2026-44289","kev_date_added":null,"published":"2026-05-13"}],"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":"total"},"state":"PUBLISHED","updated":"2026-05-13","vendors":["protobufjs"]},"summary":"Attackers can execute arbitrary code via prototype pollution in protobufjs by injecting malicious strings into generated JavaScript functions.","url":"https://insights.sbomify.com/CVE-2026-44291/"}