Vulnerability · Published Mar 27, 2026 · Assigned by GitHub_M

CVE-2026-34368AVideo Vulnerable to Wallet Balance Double-Spend via TOCTOU Race Condition in transferBalance

Medium 5.3

In plain English

A medium-severity race condition in AVideo from WWBN. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 85.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the `transferBalance()` method in `plugin/YPTWallet/YPTWallet.php` contains a Time-of-Check-Time-of-Use (TOCTOU) race condition. The method reads the sender's wallet balance, checks sufficiency in PHP, then writes the new balance — all without database transactions or row-level locking. An attacker with multiple authenticated sessions can send concurrent transfer requests that all read the same stale balance, each passing the balance check independently, resulting in only one deduction being applied while the recipient is credited multiple times. Commit 34132ad5159784bfc7ba0d7634bb5c79b769202d contains a fix.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	wwbn/avideo	no fix listed	GHSA-h54m-c522-h6qr

Affected products (as reported)

Vendor	Product	Versions
WWBN	AVideo	<= 26.0

Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-h54m-c522-h6qr x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/34132ad5159784bfc7ba0d7634bb5c79b769202d x_refsource_MISC