# CVE-2026-125712: GStreamer gst-plugins-base RTCP SDES packet parser buffer over-read

Source: https://junglewise.ai/threats/cve-2026-125712-a-flaw-was-found-in-gstreamer-s-gst-plugins-base-rtcp-sdes  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-125712 · Severity: high · CVSS 8.2 · Published 2026-11-10

GStreamer is a multimedia framework used to handle audio and video streaming. An attacker who can send network packets to an active media session can craft a malformed RTCP SDES packet that causes the receiver to read beyond its buffer boundaries, potentially crashing the application or leaking sensitive data from the process memory.

Technologies: [Gstreamer Gst-Plugins-Base](https://junglewise.ai/threats/technologies/gstreamer-gst-plugins-base). Vendors: [Gstreamer](https://junglewise.ai/threats/vendors/gstreamer).

## Quick answers

**Is CVE-2026-125712 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-125712 being exploited in the wild.

**How severe is CVE-2026-125712?** High severity, with a CVSS score of 8.2, published 10 November 2026.

**Which products and versions are affected?** Gstreamer Gst-Plugins-Base <UNKNOWN>.

**Is there a fix for CVE-2026-125712?** 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.

**How is CVE-2026-125712 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-125712?** Check whether you run Gstreamer Gst-Plugins-Base 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.

## Technical details

A bounds validation flaw exists in the RTCP SDES packet parser within GStreamer's gst-plugins-base. An attacker can supply an SDES entry with a declared length that exceeds the actual received packet size, causing an out-of-bounds read when the parser attempts to access the oversized field. This remote vulnerability requires network access to an active media session and can result in denial of service or limited information disclosure.

## Affected products

- GStreamer gst-plugins-base <UNKNOWN>

## Timeline

- 2026-11-10: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://gitlab.freedesktop.org/gstreamer/gstreamer](https://gitlab.freedesktop.org/gstreamer/gstreamer)

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- [GStreamer gst-plugins-base quadratic regex in SRT/WebVTT parser](https://junglewise.ai/threats/cve-2026-125040-a-flaw-was-found-in-the-srt-and-webvtt-subtitle-parser-in)
- [GStreamer gst-plugins-base NULL pointer dereference in MicroDVD parser](https://junglewise.ai/threats/cve-2026-119842-a-flaw-was-found-in-gstreamer-s-gst-plugins-base-microdvd)
- [GStreamer gst-plugins-base heap buffer overflow in GstVideoMeta](https://junglewise.ai/threats/cve-2026-86476-a-flaw-was-found-in-gst-plugins-base-a-heap-buffer-overflow-can)