CVE-2026-84308
1 advisory.
Packagist/phpseclib/phpseclib CVE-2026-84308: medium 6.3, EPSS 0.33%
phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery
Action: Upgrade phpseclib/phpseclib to 3.0.57 or later.
composer require phpseclib/phpseclib:3.0.57composer require phpseclib/phpseclib:4.0.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.0.57 | - |
| 4.0.0 | 4.0.1 | - |
Fixed versions
| 3.0.57 | 4.0.1 |
Sources
- osv: GHSA-q97c-8qh3-fpc6
- https://github.com/phpseclib/phpseclib/security/advisories/GHSA-q97c-8qh3-fpc6
- https://nvd.nist.gov/vuln/detail/CVE-2026-84308
- https://github.com/phpseclib/phpseclib/commit/fb56bc5bb9009b54a6c26b31aeec8ed944f17373
- https://github.com/phpseclib/phpseclib
- https://github.com/phpseclib/phpseclib/releases/tag/3.0.57
- https://github.com/phpseclib/phpseclib/releases/tag/4.0.1
CVE-2026-84308 · published · modified · JSON