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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)).

PUBLISHED Reserved 2026-03-22 | Published 2026-03-23 | Updated 2026-03-23 | Assigner snyk




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P

Problem types

Infinite loop

Credits

Kr0emer

References

security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938

gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264

github.com/kjur/jsrsasign/pull/648

github.com/...ommit/ca5b027240287a1e71fe63019fc4400332594323

cve.org (CVE-2026-4598)

nvd.nist.gov (CVE-2026-4598)

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