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.
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
17.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-681
Status
published
Products (3)
jsrsasign_project/jsrsasign
< 11.1.1
n/a/jsrsasign
< 11.1.1
npm/jsrsasign
0 - 11.1.1npm
Published
Mar 23, 2026
Tracked Since
Mar 23, 2026