CVE-2026-125703: Gst plugins bad1.0 · A flaw was found in the GStreamer gst-plugins-bad MXF plugin
Affects gst-plugins-bad1.0Source GCVE Database
Not known to be exploited · CVSS 6.5 Medium.
Data as of 13 Nov 2026, 22:33 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 6.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu Pro 24.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/nobleOther threats | Affected
| Fixed in– |
Ubuntu Pro 22.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/jammyOther threats | Affected
| Fixed in– |
Ubuntu Pro 20.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/focalOther threats | Affected
| Fixed in– |
Ubuntu Pro 18.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps/bionicOther threats | Affected
| Fixed in– |
Ubuntu Pro 16.04 LTSgst-plugins-bad1.0pkg:deb/ubuntu/gst-plugins-bad1.0?arch=source&distro=esm-apps-legacy/xenialOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
There is no complete mitigation available while processing untrusted MXF content with the affected plugin. If MXF support is not required, disable the MXF plugin in affected GStreamer applications. Otherwise, restrict MXF inputs to trusted sources. Disabling MXF handling will prevent legitimate MXF playback and transcoding.
Description
A vulnerability exists in the GStreamer gst-plugins-bad MXF plugin due to insufficient bounds checks when parsing crafted VANC data and incorrect buffer size calculations when muxing multiple ancillary packets. This can lead to out-of-bounds reads and writes, potentially crashing the application and causing a denial of service. The flaw affects multiple specific versions of gst-plugins-bad1.0 as used in various Ubuntu packages. No confidentiality or integrity impacts have been established. Mitigation involves disabling the MXF plugin if MXF support is not required or restricting MXF inputs to trusted sources.
References
- ubuntu.com/security/CVE-2026-125703 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-125703 (opens in a new tab)
- gstreamer.freedesktop.org/security/sa-2026-0029.html (opens in a new tab)
- gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11585 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-125703 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2569129 (opens in a new tab)