---
cve: "CVE-2026-74871"
severity: "MEDIUM"
cvss: 6.9
epss: "9%"
vendor: "jahlives"
kev: false
exploited: false
published: "2026-08-17 11:16:41"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T07:08:22+02:00"
---

# CVE-2026-74871

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 805ee093ec87b8426235df9077ef8d6bd41f15cb (Commit)

## Referenzen

- <https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43>
- <https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74871) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_