VulnerabilityPublished 16 Oct 2026Updated 19 Oct 2026

CVE-2026-46471: Buffer Over-read in GStreamer Gst-plugins-good

Affects gst-plugins-goodSource CVE Database V5

Not known to be exploited · CVSS 5.5 Medium : upgrade to 1.28.2 when convenient.

Data as of 26 Oct 2026, 14:18 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Affects: GStreamer gst-plugins-good before 1.28.2
Patch: Available – fixed in 1.28.2

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

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade gstreamer/gst-plugins-good to 1.28.2.

Affected software

Product	Affected	Fixed in
GitHubgstreamer/gst-plugins-good`pkg:github/gstreamer/gst-plugins-good`Other threats	Affected <1.28.2	Fixed in 1.28.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in GStreamer gst-plugins-good version 1.28.2. Users should upgrade to version 1.28.2 or later to remediate this vulnerability. No other mitigation guidance is provided.

Description

A heap buffer over-read vulnerability exists in the isomp4 plugin of GStreamer gst-plugins-good before version 1.28.2. The issue occurs during MP4 file parsing in the qtdemux_parse_uuid function, potentially allowing an attacker to disclose heap memory contents. This vulnerability has a medium severity rating with a CVSS score of 5.5.

Impact

An attacker who can supply a crafted MP4 file to the vulnerable GStreamer component may cause the isomp4 plugin to read beyond the intended buffer, disclosing contents of heap memory. This could lead to information leakage but does not impact integrity or availability according to the CVSS vector.

Summary

CVE-2026-46471 describes a vulnerability in GStreamer gst-plugins-good versions prior to 1.28.2. Specifically, the isomp4 plugin's qtdemux_parse_uuid function may read beyond the allocated heap buffer boundary while parsing MP4 files. This out-of-bounds read can lead to disclosure of heap memory contents, potentially exposing sensitive information. The vulnerability is classified under CWE-126 (Buffer Over-read).

CWE-126Buffer Over-read (opens in a new tab)
Variant weakness
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Oct 2026, 17:59 UTC

WeaknessesCWE-126

Technical details

References

Community reviews

Related threats