CVE-2026-81692CWE-789

CVE-2026-81692

High · published August 27, 2026

CVSS v3.1

7.5

EPSS

Percentile

41.1

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 7.5 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS: 0.00488 · 41.1th percentile
Weakness: CWE-789 · Memory Allocation with Excessive Size Value
Published: 2026-08-27T21:20Z

References (2)

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-wr9q-p3rj-vqq7 · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-denial-of-service-via-streaminfo · [email protected]

EPSS history

Timeline

27 AUG 14:50Z
openssl_encrypt before 1.4.9 Denial of Service via STREAMINFO
cvelistv5