{"answers":{"affected":"2 open source packages ship an affected version, including msrcrypto. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-1026 in the wild and no public exploit code.","fix":"Upgrade msrcrypto to 1.5.8 or later.","what":"CVE-2020-1026 is a critical vulnerability in Microsoft Research JavaScript Cryptography Library V1.4, published on 15 Apr 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-2020-1026 and fix it if it is affected.\n\nWhat it is: CVE-2020-1026 is a critical vulnerability in Microsoft Research JavaScript Cryptography Library V1.4, published on 15 Apr 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-2020-1026 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- msrcrypto (npm): affected all versions; fixed in 1.5.8\n- msrcrypto (npm): affected all versions; fixed in 1.5.8\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-2020-1026/ (Markdown: https://insights.sbomify.com/CVE-2020-1026/index.md)","id":"CVE-2020-1026","markdown":"https://insights.sbomify.com/CVE-2020-1026/index.md","name":"CVE-2020-1026","record":{"aliases":["GHSA-9x9j-836w-8f55"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript cryptography library","requires_auth":"none","summary":"Attackers can bypass cryptographic checks to leak private keys or forge valid signatures in the MSR JavaScript Cryptography Library.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"research_javascript_cryptography_library","vendor":"microsoft"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"},{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"A Security Feature Bypass vulnerability exists in the MSR JavaScript Cryptography Library that is caused by multiple bugs in the library’s Elliptic Curve Cryptography (ECC) implementation.An attacker could potentially abuse these bugs to learn information about a server’s private ECC key (a key leakage attack) or craft an invalid ECDSA signature that nevertheless passes as valid.The security update addresses the vulnerability by fixing the bugs disclosed in the ECC implementation, aka 'MSR JavaScript Cryptography Library Security Feature Bypass Vulnerability'.","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":"Incorrect Calculation in the MSR JavaScript Cryptography Library","id":"CVE-2020-1026","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"security_feature_bypass","year":"2020"},"n_packages":2,"n_references":1,"next":{"headline":"Microsoft Windows Kernel Privilege Escalation","id":"CVE-2020-1027"},"packages":[{"ecosystem":"npm","fixed":["1.5.8"],"introduced":["0"],"last_affected":[],"package":"msrcrypto","purl":null,"source":"GHSA-9x9j-836w-8f55"},{"ecosystem":"npm","fixed":["1.5.8"],"introduced":["0"],"last_affected":[],"package":"msrcrypto","purl":"pkg:npm/msrcrypto","source":"GHSA-9x9j-836w-8f55"}],"prev":{"headline":"Microsoft Office Elevation of Privilege Vulnerability","id":"CVE-2020-1025"},"products":["Microsoft Research JavaScript Cryptography Library V1.4"],"published":"2020-04-15","related":[{"cvss_score":9.8,"headline":"Sensitive Data Exposure in msrcrypto","id":"CVE-2018-8319","kev_date_added":null,"published":"2018-07-11"}],"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":"2024-08-04","vendors":["Microsoft"]},"summary":"Attackers can bypass cryptographic checks to leak private keys or forge valid signatures in the MSR JavaScript Cryptography Library.","url":"https://insights.sbomify.com/CVE-2020-1026/"}