Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-4598
n/a jsrsasign — Versions of the package jsrsasign before 11.1.1 are vulnerable to Infinite loop via the bnModInverse function in ext/jsbn2.js when the Bi…
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N N N N H 7.7 .0096 60.4 —
AFFECTED
Product Versions Fixed
jsrsasign unspecified —
org.webjars.npm:jsrsasign unspecified —
TIMELINE
Mar 22 Reserved by snyk
Mar 23 Published (CNA: snyk)
Aug 17 EXPLOIT PUBLISHED — CVE-2026-4598 (jsrsasign). Public exploit reference added.
Aug 17 RESCORED — CVE-2026-4598 (jsrsasign). CVSS 8.7 → 7.7 (NVD).
Sep 10 EXPLOIT PUBLISHED — CVE-2026-4598 (jsrsasign). Public exploit reference added.
Description
Versions of the package jsrsasign before 11.1.1 are vulnerable to Infinite loop via the bnModInverse function in ext/jsbn2.js when the BigInteger.modInverse implementation receives zero or negative inputs, allowing an attacker to hang the process permanently by supplying such crafted values (e.g., modInverse(0, m) or modInverse(-1, m)).
Lifecycle
Complete event history — 5 events, chronological
| Date | Event | Detail |
|---|
| March 22, 2026 | Reserved | Reserved by snyk |
| March 23, 2026 | Published | Published (CNA: snyk) |
| August 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-4598 (jsrsasign). Public exploit reference added. |
| August 17, 2026 | RESCORED | RESCORED — CVE-2026-4598 (jsrsasign). CVSS 8.7 → 7.7 (NVD). |
| September 10, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-4598 (jsrsasign). Public exploit reference added. |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| n/a | jsrsasign | — | — | — |
| n/a | org.webjars.npm:jsrsasign | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-4598 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
