CVE-2026-86514: Stack-based Buffer Overflow in vgmstream
Description
A weakness has been identified in vgmstream up to r2117. This issue affects the function sscanf of the file src/meta/txth.c of the component txth-txtp. This manipulation causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Patch name: 4669d37a6af94866f6f0628678f9f90d46954e8b. To fix this issue, it is recommended to deploy a patch.
CVSS v4.0
Score 5.3medium
Affected software
vgmstream
cpe:2.3:a:vgmstream:vgmstream:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in vgmstream up to r2117 involves a stack-based buffer overflow caused by improper handling in the sscanf function of the src/meta/txth.c file, specifically in the txth-txtp component. The flaw allows remote attackers to trigger the overflow, potentially leading to code execution or denial of service. Public exploit code exists, increasing the risk of exploitation. The issue is addressed by a patch referenced by commit 4669d37a6af94866f6f0628678f9f90d46954e8b.
Potential Impact
The vulnerability allows remote attackers to cause a stack-based buffer overflow in vgmstream, which could lead to arbitrary code execution or application crashes. The availability of public exploit code increases the likelihood of exploitation. The CVSS 4.0 base score is 5.3, indicating a medium severity impact with network attack vector, low complexity, no privileges required, and user interaction needed.
Mitigation Recommendations
A patch identified by commit 4669d37a6af94866f6f0628678f9f90d46954e8b is available and should be deployed to remediate this vulnerability. Users of vgmstream up to r2117 are advised to update to the fixed version incorporating this patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-07T19:18:11.905Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9f787cacd9273b49ddda3a
Added to database: 09/08/2026, 02:52:44 UTC
Last enriched: 09/16/2026, 01:22:05 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 89
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