# jsrsasign (npm) vulnerabilities Source: https://junglewise.ai/threats/technologies/jsrsasign Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/jsrsasign.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 14 vulnerabilities in jsrsasign (npm): 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-4603, was published on 23 March 2026. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 14 (1 critical, 0 exploited in the wild) ## About jsrsasign (npm) JavaScript library for RSA digital signature generation and verification in browsers and Node.js. ## Latest jsrsasign (npm) vulnerabilities - [CVE-2026-4603: jsrsasign division by zero in RSA public key parsing](https://junglewise.ai/threats/cve-2026-4603-jsrsasign-division-by-zero-in-rsa-public-key-parsing) (medium, CVSS 5.9, published 23 Mar 2026) - [CVE-2026-4602: jsrsasign incorrect numeric conversion in BigInteger modPow](https://junglewise.ai/threats/cve-2026-4602-jsrsasign-incorrect-numeric-conversion-in-biginteger-modpow) (high, CVSS 7.5, published 23 Mar 2026) - [CVE-2026-4601: jsrsasign private key recovery via missing DSA check in signWithMessageHash](https://junglewise.ai/threats/cve-2026-4601-jsrsasign-private-key-recovery-via-missing-dsa-check-in) (high, CVSS 8.7, published 23 Mar 2026) - [CVE-2026-4600: kjur jsrsasign signature forgery via DSA domain parameter validation](https://junglewise.ai/threats/cve-2026-4600-kjur-jsrsasign-signature-forgery-via-dsa-domain-parameter) (high, CVSS 7.4, published 23 Mar 2026) - [CVE-2026-4599: jsrsasign private key recovery via biased DSA nonce generation](https://junglewise.ai/threats/cve-2026-4599-jsrsasign-private-key-recovery-via-biased-dsa-nonce-generation) (critical, CVSS 9.1, published 23 Mar 2026) - [CVE-2026-4598: jsrsasign infinite loop in BigInteger.modInverse](https://junglewise.ai/threats/cve-2026-4598-jsrsasign-infinite-loop-in-biginteger-modinverse) (high, CVSS 7.5, published 23 Mar 2026) - [CVE-2024-21484: jsrsasign RSA PKCS#1.5 and RSAOAEP Marvin attack](https://junglewise.ai/threats/cve-2024-21484-jsrsasign-rsa-pkcs-1-5-and-rsaoaep-marvin-attack) (low, CVSS 3.1, published 19 Jan 2024) - [CVE-2022-25898: kjur jsrsasign improper signature verification in JWS and JWT](https://junglewise.ai/threats/cve-2022-25898-kjur-jsrsasign-improper-signature-verification-in-jws-and-jwt) (low, CVSS 3.1, published 25 Jun 2022) - [jsrsasign RSA signature verification bypass](https://junglewise.ai/threats/jsrsasign-rsa-signature-verification-bypass-f4eed909) (info, published 9 Feb 2022) - [CVE-2021-30246: kjur jsrsasign RSA signature validation bypass in PKCS#1 v1.5 padding](https://junglewise.ai/threats/cve-2021-30246-kjur-jsrsasign-rsa-signature-validation-bypass-in-pkcs-1-v1-5) (low, CVSS 3.1, published 16 Apr 2021) - [jsrsasign ECDSA timing attack in signature generation](https://junglewise.ai/threats/jsrsasign-ecdsa-timing-attack-in-signature-generation-a79a9b07) (low, CVSS 3.1, published 30 Jun 2020) - [CVE-2020-14966: jsrsasign ECDSA signature validation ASN.1 encoding bypass](https://junglewise.ai/threats/cve-2020-14966-jsrsasign-ecdsa-signature-validation-asn-1-encoding-bypass) (low, CVSS 3.1, published 26 Jun 2020) - [CVE-2020-14967: jsrsasign RSA PKCS#1 decryption bypass with prepended zeros](https://junglewise.ai/threats/cve-2020-14967-jsrsasign-rsa-pkcs-1-decryption-bypass-with-prepended-zeros) (low, CVSS 3.1, published 26 Jun 2020) - [CVE-2020-14968: jsrsasign RSA-PSS signature validation bypass via prepended zeros](https://junglewise.ai/threats/cve-2020-14968-jsrsasign-rsa-pss-signature-validation-bypass-via-prepended-zeros) (low, CVSS 3.1, published 26 Jun 2020) ## Most severe jsrsasign (npm) vulnerabilities - [CVE-2026-4599: jsrsasign private key recovery via biased DSA nonce generation](https://junglewise.ai/threats/cve-2026-4599-jsrsasign-private-key-recovery-via-biased-dsa-nonce-generation) (critical, CVSS 9.1, published 23 Mar 2026) - [CVE-2026-4601: jsrsasign private key recovery via missing DSA check in signWithMessageHash](https://junglewise.ai/threats/cve-2026-4601-jsrsasign-private-key-recovery-via-missing-dsa-check-in) (high, CVSS 8.7, published 23 Mar 2026) - [CVE-2026-4598: jsrsasign infinite loop in BigInteger.modInverse](https://junglewise.ai/threats/cve-2026-4598-jsrsasign-infinite-loop-in-biginteger-modinverse) (high, CVSS 7.5, published 23 Mar 2026) - [CVE-2026-4602: jsrsasign incorrect numeric conversion in BigInteger modPow](https://junglewise.ai/threats/cve-2026-4602-jsrsasign-incorrect-numeric-conversion-in-biginteger-modpow) (high, CVSS 7.5, published 23 Mar 2026) - [CVE-2026-4600: kjur jsrsasign signature forgery via DSA domain parameter validation](https://junglewise.ai/threats/cve-2026-4600-kjur-jsrsasign-signature-forgery-via-dsa-domain-parameter) (high, CVSS 7.4, published 23 Mar 2026) - [CVE-2026-4603: jsrsasign division by zero in RSA public key parsing](https://junglewise.ai/threats/cve-2026-4603-jsrsasign-division-by-zero-in-rsa-public-key-parsing) (medium, CVSS 5.9, published 23 Mar 2026) - [CVE-2020-14968: jsrsasign RSA-PSS signature validation bypass via prepended zeros](https://junglewise.ai/threats/cve-2020-14968-jsrsasign-rsa-pss-signature-validation-bypass-via-prepended-zeros) (low, CVSS 3.1, published 26 Jun 2020) - [CVE-2020-14967: jsrsasign RSA PKCS#1 decryption bypass with prepended zeros](https://junglewise.ai/threats/cve-2020-14967-jsrsasign-rsa-pkcs-1-decryption-bypass-with-prepended-zeros) (low, CVSS 3.1, published 26 Jun 2020) - [CVE-2020-14966: jsrsasign ECDSA signature validation ASN.1 encoding bypass](https://junglewise.ai/threats/cve-2020-14966-jsrsasign-ecdsa-signature-validation-asn-1-encoding-bypass) (low, CVSS 3.1, published 26 Jun 2020) - [CVE-2024-21484: jsrsasign RSA PKCS#1.5 and RSAOAEP Marvin attack](https://junglewise.ai/threats/cve-2024-21484-jsrsasign-rsa-pkcs-1-5-and-rsaoaep-marvin-attack) (low, CVSS 3.1, published 19 Jan 2024) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other npm technologies - [openclaw (npm)](https://junglewise.ai/threats/technologies/npm-openclaw): 214 vulnerabilities - [flowise (npm)](https://junglewise.ai/threats/technologies/flowise): 133 vulnerabilities - [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server): 117 vulnerabilities - [vm2 (npm)](https://junglewise.ai/threats/technologies/vm2): 111 vulnerabilities - [electron (npm)](https://junglewise.ai/threats/technologies/electron): 77 vulnerabilities - [ghost (npm)](https://junglewise.ai/threats/technologies/ghost): 74 vulnerabilities - [n8n (npm)](https://junglewise.ai/threats/technologies/npm-n8n): 64 vulnerabilities - [hono (npm)](https://junglewise.ai/threats/technologies/hono): 62 vulnerabilities - [directus (npm)](https://junglewise.ai/threats/technologies/directus): 61 vulnerabilities - [nocodb (npm)](https://junglewise.ai/threats/technologies/nocodb): 54 vulnerabilities - [undici (npm)](https://junglewise.ai/threats/technologies/undici): 53 vulnerabilities - [@budibase/server (npm)](https://junglewise.ai/threats/technologies/budibase-server): 42 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "jsrsasign (npm) vulnerabilities", https://junglewise.ai/threats/technologies/jsrsasign, 13 November 2026.