CVE-2026-4602
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
13th
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.
| CWE | CWE-681 |
| Vendor | n/a |
| Product | jsrsasign |
| Published | Mar 23, 2026 |
| Last Updated | Mar 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
n/a / jsrsasign
0 < 11.1.1
References
security.snyk.io: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175 gist.github.com: https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5 github.com: https://github.com/kjur/jsrsasign/pull/650 github.com: https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195
Credits
Kr0emer