highCVSS 8.7Vulnerability
CVE-2026-4601
Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Properties
- summary
- jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction
- severity
- high
- epss_score
- 0.003
- cvss_score
- 8.7
- ghsa_published
- 2026-03-23T06:30:29Z
- source_url
- https://github.com/advisories/GHSA-w8q8-93cx-6h7r
- ghsa_updated
- 2026-03-29T15:52:00Z
- ghsa_id
- GHSA-w8q8-93cx-6h7r
- cve_id
- CVE-2026-4601
- cvss_vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
- is_ghsa_only
- false
- epss_percentile
- 0.22361
Related Entities (4)
ENRICHED_BY (1)
→[Source]FIRST EPSS
REPORTED_BY (1)
→[Source]GitHub Advisory Database
AFFECTS (1)
→[Software]npm/jsrsasign
HAS_WEAKNESS (1)
→[Weakness]Missing Cryptographic Step
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