Description
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.
Recommendation
Update the jsrsasign package to the latest compatible version. Followings are version details:
- Affected version(s): < 11.1.1
- Patched version(s): 11.1.1
References
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See something that needs correcting? Let us knowUpdated July 21, 2026