Critical
openssl_encrypt before 1.4.0 Weak Key Derivation via HKDF
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.
Announced Source revision 1
Original source ↗CVE-2026-74889
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-2026-74889
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": "1.4.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.4.0",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/openssl_encrypt",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-74889
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #5509 · Revision 1
- Added to Heist Feed
- Publisher date