{"answers":{"affected":"2 open source packages ship an affected version, including jsrsasign. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-4599 in the wild and no public exploit code.","fix":"Upgrade jsrsasign to 11.1.1 or later.","what":"CVE-2026-4599 is a critical vulnerability in jsrsasign, published on 23 Mar 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-2026-4599 and fix it if it is affected.\n\nWhat it is: CVE-2026-4599 is a critical vulnerability in jsrsasign, published on 23 Mar 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-2026-4599 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- jsrsasign (npm): affected from 7.0.0; fixed in 11.1.1\n- jsrsasign (npm): affected from 7.0.0; fixed in 11.1.1\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-2026-4599/ (Markdown: https://insights.sbomify.com/CVE-2026-4599/index.md)","id":"CVE-2026-4599","markdown":"https://insights.sbomify.com/CVE-2026-4599/index.md","name":"CVE-2026-4599","record":{"aliases":["GHSA-5jx8-q4cp-rhh6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript crypto library","requires_auth":"none","summary":"An attacker can recover private keys by exploiting biased DSA nonces caused by incorrect comparison logic in the jsrsasign library.","user_interaction":"not_required","vuln_class":"weak_cryptography"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"jsrsasign","vendor":"kjur"}],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-338","name":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"},{"id":"CWE-1023","name":"Incomplete Comparison with Missing Factors"}],"description":"Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to Incomplete Comparison with Missing Factors via the getRandomBigIntegerZeroToMax and getRandomBigIntegerMinToMax functions in src/crypto-1.1.js; an attacker can recover the private key by exploiting the incorrect compareTo checks that accept out-of-range candidates and thus bias DSA nonces during signature generation.","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":"jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation","id":"CVE-2026-4599","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"weak_cryptography","year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic","id":"CVE-2026-4600"},"packages":[{"ecosystem":"npm","fixed":["11.1.1"],"introduced":["7.0.0"],"last_affected":[],"package":"jsrsasign","purl":null,"source":"GHSA-5jx8-q4cp-rhh6"},{"ecosystem":"npm","fixed":["11.1.1"],"introduced":["7.0.0"],"last_affected":[],"package":"jsrsasign","purl":"pkg:npm/jsrsasign","source":"GHSA-5jx8-q4cp-rhh6"}],"prev":{"headline":"jsrsasign is vulnerable to DoS through Infinite Loop when processing zero or negative inputs","id":"CVE-2026-4598"},"products":["jsrsasign","org.webjars.npm:jsrsasign"],"published":"2026-03-23","related":[{"cvss_score":9.8,"headline":"RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign","id":"CVE-2020-14967","kev_date_added":null,"published":"2020-06-22"},{"cvss_score":9.8,"headline":"RSA-PSS signature validation vulnerability by prepending zeros in jsrsasign","id":"CVE-2020-14968","kev_date_added":null,"published":"2020-06-22"},{"cvss_score":9.4,"headline":"jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction","id":"CVE-2026-4601","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":9.1,"headline":"jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic","id":"CVE-2026-4600","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":9.1,"headline":"RSA signature validation vulnerability on maleable encoded message in jsrsasign","id":"CVE-2021-30246","kev_date_added":null,"published":"2021-04-07"},{"cvss_score":8.7,"headline":"jsrsasign is vulnerable to DoS through Infinite Loop when processing zero or negative inputs","id":"CVE-2026-4598","kev_date_added":null,"published":"2026-03-23"}],"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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-10","vendors":["n/a"]},"summary":"An attacker can recover private keys by exploiting biased DSA nonces caused by incorrect comparison logic in the jsrsasign library.","url":"https://insights.sbomify.com/CVE-2026-4599/"}