Vulnerability · Published Sep 8, 2026 · Assigned by VulDB

CVE-2026-86514vgmstream txth-txtp txth.c sscanf stack-based overflow

Medium 6.3

In plain English

A medium-severity stack buffer overflow in vgmstream. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.5%top 59.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	vgmstream	r2117

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

References

VDB-399668 | vgmstream txth-txtp txth.c sscanf stack-based overflow vdb-entry, technical-description
VDB-399668 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-86514 | CVE Analysis and Report third-party-advisory
Submit #908369 | vgmstream r2117 Stack-based Buffer Overflow third-party-advisory
https://github.com/vgmstream/vgmstream/issues/1972 exploit, issue-tracking
https://github.com/vgmstream/vgmstream/pull/1956 issue-tracking, patch
https://github.com/vgmstream/vgmstream/commit/4669d37a6af94866f6f0628678f9f90d46954e8b patch
https://github.com/vgmstream/vgmstream/ product