CVE-2026-4602

7.5 HIGH
Published: March 23, 2026 Modified: March 23, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5
Source: report@snyk.io
Exploit Mitigation Third Party Advisory
https://github.com/kjur/jsrsasign/pull/650
Source: report@snyk.io
Issue Tracking
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175
Source: report@snyk.io
Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.1%
16th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

jsrsasign_project