CVE-2026-63269
Description
A flaw was found in LibreOffice. When processing linked audio or video files on Linux systems, the application uses the GStreamer multimedia framework for playback. By convincing a victim to open a specially crafted document containing a malicious HTTP Live Streaming (HLS) playlist, an attacker can cause GStreamer to read arbitrary local files or remote resources. This flaw can lead to information disclosure, as the contents of sensitive local files may be exposed directly within the document.
Statement
A security flaw was found in LibreOffice on Linux platforms when rendering linked media files using the GStreamer framework. An attacker can exploit this by enticing a user to open a document with a crafted HTTP Live Streaming (HLS) playlist. When the document loads, GStreamer processes the playlist and reads local files or remote URLs specified within it. This can lead to sensitive local file contents being exposed directly inside the document context under the executing user's privileges.
Mitigation
Configure LibreOffice to restrict automatic link updating by navigating to Tools -> Options -> LibreOffice -> General and setting "Update links when loading" to "On request" or "Never". Alternatively, refrain from opening untrusted documents containing linked multimedia files.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Required | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | High | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Integrity,Confidentiality
Technical Impact: Read Files or Directories; Modify Files or Directories
The application can operate on unexpected files. Confidentiality is violated when the targeted filename is not directly readable by the attacker.
Integrity,Confidentiality,Availability
Technical Impact: Modify Files or Directories; Execute Unauthorized Code or Commands
The application can operate on unexpected files. This may violate integrity if the filename is written to, or if the filename is for a program or other form of executable code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (Other)
The application can operate on unexpected files. Availability can be violated if the attacker specifies an unexpected file that the application modifies. Availability can also be affected if the attacker specifies a filename for a large file, or points to a special device or a file that does not have the format that the application expects.
Frequently Asked Questions
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