Integrity Bypass Vulnerability in openssl_encrypt by OpenSSL
CVE-2026-81717

9.3CRITICAL

Key Information:

Vendor

Jahlives

Status
OpenSSL Encrypt
Vendor
CVE Published:
27 August 2026

What is CVE-2026-81717?

The openssl_encrypt package prior to version 1.4.9 contains significant vulnerabilities related to its portable USB drive functionality. This vulnerability allows an attacker with physical write access to a removable drive to potentially introduce unauthorized files, including a root-level autorun payload, which the integrity verification fails to detect. Furthermore, the use of a static, source-embedded KDF salt for key derivation on certain drives significantly weakens the encryption, making it susceptible to offline attacks such as rainbow table attacks.

Affected Version(s)

openssl_encrypt 0 < 1.4.9

openssl_encrypt 1.4.9

References

https://github.com/jahlives/openssl_encrypt/security/advi...
vendor-advisory
https://www.vulncheck.com/advisories/openssl-encrypt-befo...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.