# CVE-2019-9423: PYSEC-2026-719 - Out-of-bounds Write in OpenCV

Source: https://junglewise.ai/threats/cve-2019-9423-out-of-bounds-write-in-opencv  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-02  
License: CC BY 4.0 with a link back

CVE-2019-9423 · Severity: low · CVSS 3.1 · Published 2026-07-02

Out-of-bounds Write in OpenCV

Technologies: [opencv-contrib-python (PyPI)](https://junglewise.ai/threats/technologies/opencv-contrib-python), [opencv-contrib-python-headless (PyPI)](https://junglewise.ai/threats/technologies/opencv-contrib-python-headless), [opencv-python (PyPI)](https://junglewise.ai/threats/technologies/opencv-python), [opencv-python-headless (PyPI)](https://junglewise.ai/threats/technologies/opencv-python-headless). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2019-9423 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-9423 being exploited in the wild.

**How severe is CVE-2019-9423?** Low severity, with a CVSS score of 3.1, published 2 July 2026.

**Which products and versions are affected?** opencv-contrib-python (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26; opencv-contrib-python-headless (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26; opencv-python (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26; opencv-python-headless (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26.

**Is there a fix for CVE-2019-9423?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2019-9423?** Check whether you run opencv-contrib-python (PyPI), opencv-contrib-python-headless (PyPI), opencv-python (PyPI) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- opencv-contrib-python (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26
- opencv-contrib-python-headless (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26
- opencv-python (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26
- opencv-python-headless (PyPI) ECOSYSTEM:introduced=0,last_affected=4.1.1.26

## Identifiers

- CVE-2019-9423
- GHSA-8849-5h85-98qw
- PYSEC-2026-2796
- PYSEC-2026-2811
- PYSEC-2026-2835
- PYSEC-2026-719

## Related threats

- [PYSEC-2026-705 - Out-of-bounds Write in OpenCV.](https://junglewise.ai/threats/cve-2018-5268-out-of-bounds-write-in-opencv)
- [PYSEC-2026-725 - Out-of-bounds Write in OpenCV](https://junglewise.ai/threats/cve-2019-5064-out-of-bounds-write-in-opencv)
- [PYSEC-2026-724 - Out-of-bounds Write in OpenCV](https://junglewise.ai/threats/cve-2019-5063-out-of-bounds-write-in-opencv)
- [PYSEC-2026-723 - Out-of-bounds Read in OpenCV](https://junglewise.ai/threats/cve-2019-19624-out-of-bounds-read-in-opencv)
- [PYSEC-2026-726 - Out-of-bounds Read in OpenCV](https://junglewise.ai/threats/cve-2019-16249-out-of-bounds-read-in-opencv)