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Vulnerability Details :

CVE-2026-4603

Summary
Assigner-snyk
Assigner Org ID-bae035ff-b466-4ff4-94d0-fc9efd9e1730
Published At-23 Mar, 2026 | 05:00
Updated At-23 Mar, 2026 | 14:42
Rejected At-
Credits

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations (e.g., verify and encryption) to collapse to deterministic zero outputs and hide “invalid key” errors by supplying a JWK whose modulus decodes to zero.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:snyk
Assigner Org ID:bae035ff-b466-4ff4-94d0-fc9efd9e1730
Published At:23 Mar, 2026 | 05:00
Updated At:23 Mar, 2026 | 14:42
Rejected At:
▼CVE Numbering Authority (CNA)

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations (e.g., verify and encryption) to collapse to deterministic zero outputs and hide “invalid key” errors by supplying a JWK whose modulus decodes to zero.

Affected Products
Vendor
n/a
Product
jsrsasign
Versions
Affected
  • From 0 before 11.1.1 (semver)
Problem Types
TypeCWE IDDescription
N/AN/ADivision by zero
Type: N/A
CWE ID: N/A
Description: Division by zero
Metrics
VersionBase scoreBase severityVector
3.15.9MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
4.05.1MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
Version: 4.0
Base score: 5.1
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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-15371176
N/A
https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3
N/A
https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef93f
N/A
https://github.com/kjur/jsrsasign/pull/649
N/A
Hyperlink: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371176
Resource: N/A
Hyperlink: https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3
Resource: N/A
Hyperlink: https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef93f
Resource: N/A
Hyperlink: https://github.com/kjur/jsrsasign/pull/649
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
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:report@snyk.io
Published At:23 Mar, 2026 | 06:16
Updated At:22 Jun, 2026 | 03:18

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations (e.g., verify and encryption) to collapse to deterministic zero outputs and hide “invalid key” errors by supplying a JWK whose modulus decodes to zero.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.0LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.15.9MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Primary3.15.3MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
N/A
Type: Secondary
Version: 4.0
Base score: 2.0
Base severity: LOW
Vector:
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Type: Primary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches

kjur
kjur
>>jsrsasign>>Versions before 11.1.1(exclusive)
cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
CWE-369Secondaryreport@snyk.io
CWE ID: CWE-369
Type: Secondary
Source: report@snyk.io
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3report@snyk.io
Exploit
Mitigation
Third Party Advisory
https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef93freport@snyk.io
Patch
https://github.com/kjur/jsrsasign/pull/649report@snyk.io
Issue Tracking
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371176report@snyk.io
Third Party Advisory
Hyperlink: https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3
Source: report@snyk.io
Resource:
Exploit
Mitigation
Third Party Advisory
Hyperlink: https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef93f
Source: report@snyk.io
Resource:
Patch
Hyperlink: https://github.com/kjur/jsrsasign/pull/649
Source: report@snyk.io
Resource:
Issue Tracking
Hyperlink: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371176
Source: report@snyk.io
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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