# CVE-2026-88914

## Summary

- **CVE ID:** CVE-2026-88914
- **Severity:** MEDIUM
- **CVSS Score:** 4.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L)
- **CWE:** CWE-190
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## Description

A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-88914)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2531416)
- [CNA](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12433)
- [CNA](https://gstreamer.freedesktop.org/security/sa-2026-0079.html)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._