{"answers":{"affected":"2 open source packages ship an affected version, including handlebars. It affects 1 product.","exploited":"There is no known exploitation of CVE-2019-20922 in the wild and no public exploit code.","fix":"Upgrade handlebars to 4.4.5 or later.","what":"CVE-2019-20922 is a high-severity denial of service vulnerability in n/a, published on 30 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-20922 and fix it if it is affected.\n\nWhat it is: CVE-2019-20922 is a high-severity denial of service vulnerability in n/a, published on 30 Sep 2020. 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-2019-20922 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- handlebars (npm): affected from 4.0.0; fixed in 4.4.5\n- handlebars (npm): affected from 4.0.0; fixed in 4.4.5\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-2019-20922/ (Markdown: https://insights.sbomify.com/CVE-2019-20922/index.md)","id":"CVE-2019-20922","markdown":"https://insights.sbomify.com/CVE-2019-20922/index.md","name":"CVE-2019-20922","record":{"aliases":["GHSA-62gr-4qp9-h98f","SNYK-JS-HANDLEBARS-480388","UBUNTU-CVE-2019-20922"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript templating library","requires_auth":"none","summary":"Attackers can cause resource exhaustion and service disruption in applications using Handlebars by submitting crafted templates that trigger excessive regex processing.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"handlebars","vendor":"handlebarsjs"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.","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":"Regular Expression Denial of Service in Handlebars","id":"CVE-2019-20922","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2019"},"n_packages":2,"n_references":3,"next":{"headline":"Crash while handling internal Javascript exception types","id":"CVE-2019-20923"},"packages":[{"ecosystem":"npm","fixed":["4.4.5"],"introduced":["4.0.0"],"last_affected":[],"package":"handlebars","purl":null,"source":"GHSA-62gr-4qp9-h98f"},{"ecosystem":"npm","fixed":["4.4.5"],"introduced":["4.0.0"],"last_affected":[],"package":"handlebars","purl":"pkg:npm/handlebars","source":"GHSA-62gr-4qp9-h98f"}],"prev":{"headline":"Cross-site scripting in bootstrap-select","id":"CVE-2019-20921"},"products":["n/a"],"published":"2020-09-30","related":[{"cvss_score":9.8,"headline":"Handlebars.js has JavaScript Injection via AST Type Confusion","id":"CVE-2026-33937","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.3,"headline":"Handlebars.js has JavaScript Injection in CLI Precompiler via Unescaped Names and Options","id":"CVE-2026-33941","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.1,"headline":"Handlebars.js has JavaScript Injection via AST Type Confusion by tampering @partial-block","id":"CVE-2026-33938","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.1,"headline":"Handlebars.js has JavaScript Injection via AST Type Confusion when passing an object as dynamic partial","id":"CVE-2026-33940","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":8.1,"headline":"Arbitrary Code Execution in Handlebars","id":"CVE-2019-20920","kev_date_added":null,"published":"2020-09-30"},{"cvss_score":7.5,"headline":"Handlebars.js has Denial of Service via Malformed Decorator Syntax in Template Compilation","id":"CVE-2026-33939","kev_date_added":null,"published":"2026-03-27"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["n/a"]},"summary":"Attackers can cause resource exhaustion and service disruption in applications using Handlebars by submitting crafted templates that trigger excessive regex processing.","url":"https://insights.sbomify.com/CVE-2019-20922/"}