CVSS 4.0
7.7 highCVSS: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:PCVE-2026-4598
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)).
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-835, CWE-1287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- kjur:jsrsasign
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-8g7p-jf3g-gxcp | npm | jsrsasign | <11.1.1 | 11.1.1 |
References
- https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264
- https://github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323
- https://github.com/kjur/jsrsasign/pull/648
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812263
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938