CVE-2026-81692 openssl_encrypt before 1.4.9 Denial of Service via STREAMINFO
A crafted FLAC file causes excessive memory allocation in openssl_encrypt, leading to denial of service during stego extraction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-81692?
CVE-2026-81692 is a high-severity denial of service vulnerability in jahlives openssl_encrypt, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-789
Which versions are affected by CVE-2026-81692?
How do I fix CVE-2026-81692?
No fix has been published for CVE-2026-81692 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-81692 being exploited?
There is no known exploitation of CVE-2026-81692 in the wild and no public exploit code.
Sources
Also known as GHSA-jvx4-p844-xhj6, GHSA-wr9q-p3rj-vqq7.