{"answers":{"affected":"2 open source packages ship an affected version, including is_js. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-26302 exists.","fix":"No fix has been published for CVE-2020-26302 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-26302 is a high-severity denial of service vulnerability in arasatasaygin is.js, published on 23 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-26302 and fix it if it is affected.\n\nWhat it is: CVE-2020-26302 is a high-severity denial of service vulnerability in arasatasaygin is.js, published on 23 Dec 2022. 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-2020-26302 exists.\n\nAffected packages and fixed versions:\n- is_js (npm): affected all versions up to 0.9.0; no fix listed\n- is_js (npm): affected all versions up to 0.9.0; no fix listed\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-2020-26302/ (Markdown: https://insights.sbomify.com/CVE-2020-26302/index.md)","id":"CVE-2020-26302","markdown":"https://insights.sbomify.com/CVE-2020-26302/index.md","name":"CVE-2020-26302","record":{"aliases":["GHSA-pvrw-g6fx-mcx2"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript validation library","requires_auth":"none","summary":"Attackers can cause denial of service in applications using is.js by submitting malicious strings that trigger inefficient regular expressions.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"is.js","vendor":"is.js_project"}],"cvss":{"score":7.5,"severity":"high","source":"cna","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-1333","name":"Inefficient Regular Expression Complexity"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop “forever.\" This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"is_js vulnerable to Regular Expression Denial of Service","id":"CVE-2020-26302","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":2,"n_references":2,"next":{"headline":"GHSL-2020-289: Regular Expression Denial of Service (ReDoS) in insane","id":"CVE-2020-26303"},"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["0.9.0"],"package":"is_js","purl":null,"source":"GHSA-pvrw-g6fx-mcx2"},{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":["0.9.0"],"package":"is_js","purl":"pkg:npm/is_js","source":"GHSA-pvrw-g6fx-mcx2"}],"prev":{"headline":"Command injection in mscdex/ssh2","id":"CVE-2020-26301"},"products":["is.js"],"published":"2022-12-23","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":"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-14","vendors":["arasatasaygin"]},"summary":"Attackers can cause denial of service in applications using is.js by submitting malicious strings that trigger inefficient regular expressions.","url":"https://insights.sbomify.com/CVE-2020-26302/"}