CVE-2026-74874
openssl_encrypt before 1.4.0 Weak PRNG Steganography Pixel Selection
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 17, 2026
- Updated
- Oct 8, 2026
- Reserved
- Aug 17, 2026
Description
openssl_encrypt versions before 1.4.0 use Python's non-cryptographic random module for steganographic pixel selection in the generate_pseudorandom_sequence function. Attackers who know the password can recover the Mersenne Twister state from approximately 624 outputs and predict pixel locations containing hidden data for extraction.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Affected Products
| Product | Versions |
|---|---|
openssl_encryptjahlives |
|
References
- GitHub Security Advisory (GHSA-vfgx-5q85-58q3)vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.0 Weak PRNG Steganography Pixel Selectionthird-party-advisory
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