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CVE Vulnerability Details :
CVE-2026-4602
PUBLISHED
More InfoOfficial Page
Assigner-snyk
Assigner Org ID-bae035ff-b466-4ff4-94d0-fc9efd9e1730
View Known Exploited Vulnerability (KEV) details
Published At-23 Mar, 2026 | 05:00
Updated At-23 Mar, 2026 | 14:37
Rejected At-
▼CVE Numbering Authority (CNA)

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.

Affected Products
Vendor
n/a
Product
jsrsasign
Versions
Affected
  • From 0 before 11.1.1 (semver)
Problem Types
TypeCWE IDDescription
N/AN/AIncorrect Conversion between Numeric Types
Type: N/A
CWE ID: N/A
Description: Incorrect Conversion between Numeric Types
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Kr0emer
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175
N/A
https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5
N/A
https://github.com/kjur/jsrsasign/pull/650
N/A
https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195
N/A
Hyperlink: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175
Resource: N/A
Hyperlink: https://gist.github.com/Kr0emer/7ecd2be7d17419e4677315ef3758faf5
Resource: N/A
Hyperlink: https://github.com/kjur/jsrsasign/pull/650
Resource: N/A
Hyperlink: https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f98728195
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found