CVE-20XX-?
agent?

CVE-2026-12891

4.3 MEDIUM 0.4% exploit odds No fix listed Memory safety Library

What it is

A flaw was found in the GStreamer gst-plugins-bad package. When processing a malformed H.266/VVC video stream with a crafted aspect ratio indicator value, the H.266 parser performs an out-of-bounds read of up to 8 bytes from adjacent memory. This flaw allows an attacker to craft a malicious H.266 video file or stream that, when processed by a GStreamer-based application, could leak limited memory contents through video metadata, potentially exposing sensitive information from the application's address space.

At a glance

Exploitability
Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
Exploit odds
0.4% chance of exploitation in the next 30 days (EPSS).
Fix
No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Why it ranks here

Details

Published
Last modified
Exploit probability
0.4% · EPSS, next 30 days
Weakness
CWE-125 · Out-of-bounds read
Record status
Analyzed

Affected

Attack profile CVSS 3.1 · 4.3

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-12891.md and follow it. Check whether this project is affected by CVE-2026-12891. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record