CVE-2026-4602
Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative exponents in ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling modPow with a negative exponent.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.7
- CVSS vector
- 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
- EPSS probability
- 0.49%
- CWE
- CWE-681
- Published
- 2026-03-23
- Last modified
- 2026-09-07
Affected products
- n/a jsrsasign
- n/a org.webjars.npm:jsrsasign
Weakness type
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