Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.
{
"sources": [
{
"imported": "2026-04-17T00:51:47.252Z",
"database_specific": {
"status": "Modified"
},
"modified": "2025-12-03T15:15:49.833Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33560",
"id": "CVE-2021-33560",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-33560",
"published": "2021-06-08T11:15:07.767Z"
}
],
"license": "CC-BY-4.0"
}