CVE•Published 2026-03-23•Modified 2026-07-01•1 article on news•7 live references•NVD data
CVE-2026-4599Kjur · Jsrsasign
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
38
Exploit Prediction Scoring System · top 62% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-03-23
Modified 2026-07-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-4599Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Kjur Jsrsasign"All exposed Kjur Jsrsasign instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Jsrsasign"HTTP body or banner mentions "Jsrsasign" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-4599Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-4599Censys host search filtered to this CVE id.
grep.app
CVE-2026-4599Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-4599GitHub code search for direct mentions.
Google dork
"CVE-2026-4599" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.