Search
Find a vulnerability
Search criteria
ⓘ
Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.
Related vulnerabilities
PYSEC-2026-3765
Vulnerability from pysec - Published: 2026-08-17 11:16 - Updated: 2026-09-02 08:34
VLAI
Details
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.
Severity
Impacted products
| Name | purl | openssl-encrypt | pkg:pypi/openssl-encrypt |
|---|
Aliases
{
"affected": [
{
"ecosystem_specific": {},
"package": {
"ecosystem": "PyPI",
"name": "openssl-encrypt",
"purl": "pkg:pypi/openssl-encrypt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.2.2",
"0.2.3",
"0.2.4",
"0.2.5",
"0.2.6",
"0.3.0",
"0.3.1",
"0.3.2",
"0.3.3",
"0.4.0",
"0.4.1",
"0.4.2",
"0.4.3",
"0.4.4",
"0.5.0",
"0.5.1",
"0.5.3",
"0.6.0rc1",
"0.7.0rc2",
"0.7.1",
"0.7.2",
"0.8.0",
"0.8.1",
"0.8.2",
"0.9.2",
"1.0.0",
"1.0.1",
"1.0.2",
"1.0.3",
"1.1.0",
"1.2.0",
"1.2.1",
"1.3.0",
"1.3.1",
"1.3.2",
"1.3.3",
"1.3.4",
"1.3.5",
"1.4.0b3",
"1.4.0b4",
"1.4.0b5",
"1.4.0b6",
"1.4.0b7",
"1.4.0b8"
]
}
],
"aliases": [
"CVE-2026-74889",
"GHSA-j9mh-57cc-665x"
],
"details": "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.",
"id": "PYSEC-2026-3765",
"modified": "2026-09-02T08:34:40.085265Z",
"published": "2026-08-17T11:16:43.803Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j9mh-57cc-665x"
},
{
"type": "ADVISORY",
"url": "https://www.vulncheck.com/advisories/openssl-encrypt-before-weak-key-derivation-via-hkdf"
}
],
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}