VDB
CVE-2026-4602
CVE-2026-4602
PUBLISHED
CVSS 7.699999809265137 HIGH
jsrsasign: Negative Exponent Handling Leads to Signature Verification Bypass
EPSS 0.88% · 57.4th percentile
Risk Scores
CVSS 4.0
7.699999809265137
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score
0.88%
57.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| npm | jsrsasign | 0 |
| jsrsasign_project | jsrsasign | 0, 0, 0 |
| n/a | jsrsasign | 0, 0, 0 |
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
- May 18, 2026 EPSS Score
References
- https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195 patch
- https://github.com/kjur/jsrsasign/pull/650 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-4602 advisory
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175 url
- https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5 url
- https://github.com/kjur/jsrsasign package