Buffer overflow in Vgmstream
CVE-2026-86514
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (39.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Vgmstream — versions r2117
Weakness classification (CWE)
References
- vuldb.com/vuln/399668 (technical-description, vdb-entry)
- vuldb.com/vuln/399668/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86514 (third-party-advisory)
- vuldb.com/submit/908369 (third-party-advisory)
- github.com/vgmstream/vgmstream/issues/1972 (issue-tracking, exploit)
- github.com/vgmstream/vgmstream/pull/1956 (issue-tracking, patch)
- github.com/vgmstream/vgmstream/commit/4669d37a6af94866f6f0628678f9f90d46954e8b (patch)
- github.com/vgmstream/vgmstream/ (product)
Frequently asked questions
- What is CVE-2026-86514?
- CVE-2026-86514 is a medium-severity vulnerability in Vgmstream, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-09-08.
- How severe is CVE-2026-86514?
- Medium severity. CVSS v3 base score is 6.3 out of 10.