CVE-2026-81692: Memory Allocation with Excessive Size Value in jahlives openssl_encrypt
Description
openssl_encrypt (pip: openssl-encrypt) versions 1.4.8 and earlier fail to validate the 36-bit STREAMINFO total_samples field of FLAC files before using it to size an allocation (np.random.randint(size=(total_samples, channels))). A ~50-byte crafted FLAC file declaring ~100 million samples causes a multi-gigabyte memory allocation, leading to out-of-memory denial of service during 'decrypt --stego-extract'. The issue is fixed in 1.4.9; both the 1.4.x and 1.5.x lines are affected.
CVSS v4.0
Score 8.7high
Affected software
jahlives
openssl_encrypt
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The openssl_encrypt package versions 1.4.8 and earlier improperly validate the 36-bit STREAMINFO total_samples field in FLAC files before using it to allocate memory. Specifically, the total_samples value is used directly to size a numpy random integer array allocation without bounds checking, allowing a crafted FLAC file with a large total_samples value (~100 million) to trigger a multi-gigabyte memory allocation. This causes an out-of-memory denial of service during the decrypt --stego-extract process. The vulnerability affects both the 1.4.x and 1.5.x lines and is resolved in version 1.4.9.
Potential Impact
An attacker can cause a denial of service by supplying a maliciously crafted FLAC file that triggers excessive memory allocation, leading to out-of-memory conditions and potential service disruption. There is no indication of privilege escalation, code execution, or data disclosure from the provided data.
Mitigation Recommendations
Upgrade to version 1.4.9 or later, where the issue is fixed. Versions prior to 1.4.9 are vulnerable. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-27T11:12:00.889Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a906bb7acd9273b4983a24e
Added to database: 08/27/2026, 16:54:15 UTC
Last enriched: 10/02/2026, 15:55:33 UTC
Last updated: 10/09/2026, 18:48:23 UTC
Views: 52
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