VDB
CVE-2026-4602
CVE-2026-4602
PUBLISHED
CVSS 7.5 HIGH
jsrsasign: Negative Exponent Handling Leads to Signature Verification Bypass
EPSS 0.08% · 23.4th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
EPSS Score
0.08%
23.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| npm | jsrsasign | 0 |
| jsrsasign_project | jsrsasign | 0, 0, 0 |
| n/a | jsrsasign | 0, 0, 0 |
Exploit Intelligence
- https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5 (nist-nvd)
- CIRCL seen: CVE-2026-4602 (circl-sighting)
- CIRCL seen: CVE-2026-4602 (circl-sighting)
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175 (circl)
- https://github.com/kjur/jsrsasign/pull/650 (circl)
- https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195 (circl)
- ghost_report_20260112_175243.json (github-poc)
- ghost_report_20260112_175243.json (github-poc)
- ghost_report_20260112_192608.json (github-poc)
- ghost_report_20260112_192608.json (github-poc)
…and 14 more exploits
Timeline
- Mar 23, 2026 CVE Published
- Mar 23, 2026 EPSS Score
- Mar 23, 2026 PoC Published
- Mar 24, 2026 EPSS Score
- Mar 24, 2026 PoC Published
- Mar 25, 2026 EPSS Score
- Mar 25, 2026 Coalition ESS Score
- Mar 26, 2026 EPSS Score
- Mar 26, 2026 Coalition ESS Score
- Mar 27, 2026 Coalition ESS Score
- Mar 29, 2026 Security Advisory
- Mar 30, 2026 CVE Updated
References
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175 url
- https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5 url
- https://github.com/kjur/jsrsasign/pull/650 url
- https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-4602 advisory
- https://github.com/kjur/jsrsasign package