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CVE-2026-4602

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/23/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

jsrsasign_project:jsrsasign

Weaknesses (CWE)

CWE-681

References

https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5(report@snyk.io)

https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195(report@snyk.io)

https://github.com/kjur/jsrsasign/pull/650(report@snyk.io)

https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175(report@snyk.io)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.