CVE-2021-30246

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Summary

CVECVE-2021-30246
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-07 21:15:16 UTC
Updated2026-06-22 03:18:31 UTC
DescriptionIn the jsrsasign package through 10.1.13 for Node.js, some invalid RSA PKCS#1 v1.5 signatures are mistakenly recognized to be valid. NOTE: there is no known practical attack.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

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

EPSS: 0.009600000 probability, percentile 0.569320000 (date 2026-06-24)

Problem Types: CWE-347 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
2.0[email protected]Primary6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:P/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Kjur Jsrsasign All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Release add non-ascii BMPString support · kjur/jsrsasign · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Release Notes, Third Party Advisory
jsrsasign - cryptography library in JavaScript af854a3a-2127-422b-91ae-364da2661108 kjur.github.io Release Notes, Third Party Advisory
Leniency in parsing block type byte and padding bytes for PKCS#1 v1.5 signature verification · Issue #478 · kjur/jsrsasign · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 982723 Nodejs (npm) Security Update for jsrsasign (GHSA-27fj-mc8w-j9wg)
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