CVE-2026-18295

Code execution via undersized MRF atom declarations

Published Aug 20, 2026 · Updated Aug 20, 2026

Out-of-bounds write in GStreamer gst-plugins-good before 1.28.5 allows attackers to execute code by opening a crafted MRF file. The qtmoovrecover parser trusts atom size fields without enforcing minimum sizes, allocates undersized heap buffers, and writes atom fields beyond their boundaries. Exploitation requires explicit invocation of the recovery utility with attacker-controlled input and can corrupt data, crash the process, or run code in its context.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in GStreamer gst-plugins-good before 1.28.5 allows attackers to execute code by opening a crafted MRF file. The qtmoovrecover parser trusts atom size fields without enforcing minimum sizes, allocates undersized heap buffers, and writes atom fields beyond their boundaries. Exploitation requires explicit invocation of the recovery utility with attacker-controlled input and can corrupt data, crash the process, or run code in its context.

The record

CVE
CVE-2026-18295
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
GStreamer Project
Product
GStreamer
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13fcb641ed33d1472e4ffdec2846180b15405053

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

GStreamer Project · GStreamerversion=13fcb641ed33d1472e4ffdec2846180b15405053

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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