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TI-2021-10756 Aliases CVE-2021-30246GHSA-27fj-mc8w-j9wg

In the jsrsasign package through 10.1.13 for Node.js, some invalid RSA PKCS#1 v1.5…

Priority MEDIUM 41CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-347.

Summary

In 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.

Why it matters now

EPSS 0.0096 61st percentileScored 2026-11-07
Fix Fixed jsrsasign (npm): 10.2.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—jsrsasign (npm)before 10.2.010.2.0Patch availableGHSA-27fj-mc8w-j9wg
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • jsrsasign (npm) Vendor— Affected before 10.2.0 Fixed in 10.2.0 Patch available GHSA-27fj-mc8w-j9wg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:*up to 10.1.13VulnerableKjur
  • cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:* Versions up to 10.1.13 Vulnerable ·Kjur

Remediation

  • Fix · GHSA-27fj-mc8w-j9wg jsrsasign (npm) Fixed in 10.2.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30246
  2. 2026-10-03 Alias added: GHSA-27fj-mc8w-j9wg

References

Advisory 4

Other 2

  • TI-2026-04006 Incorrect numeric conversion in jsrsasign CVSS 4.0HIGH 8.7
  • TI-2026-04002 Infinite loop in jsrsasign CVSS 4.0HIGH 8.7
  • TI-2026-04004 Improper signature verification in jsrsasign CVSS 4.0CRITICAL 9.1
  • TI-2026-04003 Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to… CVSS 4.0CRITICAL 9.3
  • TI-2020-11771 An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. CVSS 3.1CRITICAL 9.8
  • TI-2020-11770 An issue was discovered in the jsrsasign package before 8.0.18 for Node.js. CVSS 3.1CRITICAL 9.8
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences