openssl_encrypt before 1.4.6 KDF Bypass via Sequential-XOR
openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.
CVE-2026-74871
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-74871
openssl_encrypt
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "jahlives",
"product": "openssl_encrypt",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.4.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.4.6",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/openssl_encrypt",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-74871
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #5498 · Revision 1
- Added to Heist Feed
- Publisher date