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GStreamer CVE-2026-18298

| EUVDEUVD-2026-63447 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-08-20 zdi GHSA-5gr2-2c8f-ph26
RCE Heap Overflow Buffer Overflow Gstreamer Red Hat Suse
7.8
CVSS 3.0 · Vendor: zdi
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Severity by source

Vendor (zdi) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

File must be opened locally (AV:L), no privileges needed (PR:N), user must open file (UI:R), full process compromise but no scope change (S:U, C/I/A:H).

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
7.8 HIGH
qualitative

Primary rating from Vendor (zdi).

CVSS VectorVendor: zdi

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 20, 2026 - 17:30 vuln.today
CVE Published
Aug 20, 2026 - 16:22 cve.org
HIGH 7.8

DescriptionCVE.org

GStreamer PNG File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of PNG files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29581.

AnalysisAI

Heap-based buffer overflow in GStreamer's PNG file parsing allows remote code execution in the context of the affected process. Affects GStreamer installations where a user can be induced to open or process a maliciously crafted PNG file - via a web page or file download. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Vulnerability AssessmentAI

Exploitation User interaction is required: the target must open or process a malicious PNG file, either by visiting a web page that triggers GStreamer-backed media parsing or by directly opening a crafted file in an application using GStreamer. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.0 score of 7.8 with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H accurately characterizes the risk: exploitation requires no system privileges and only low-complexity user interaction (opening a file), but the attack vector is local, meaning the malicious PNG must reach the victim's filesystem or be rendered in a local application context. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade GStreamer to a version incorporating commit 13fcb641ed33d1472e4ffdec2846180b15405053 or later, per ENISA EUVD-2026-63447. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: identify and inventory all systems running GStreamer (media servers, streaming platforms, browser plugins, content management systems); immediately restrict PNG file processing from untrusted sources and disable automatic PNG preview/loading where feasible; establish monitoring for suspicious PNG file access patterns in logs. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected

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CVE-2026-18298 vulnerability details – vuln.today
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