SB2026111214 - Time-of-check Time-of-use (TOCTOU) Race Condition in AVideo

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Main Vulnerability Database SB2026111214

SB2026111214 - Time-of-check Time-of-use (TOCTOU) Race Condition in AVideo

Published: November 12, 2026 Updated: November 13, 2026

Security Bulletin ID SB2026111214
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-123486)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

CVSSv4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to obtain duplicate wallet credits and subscription time for one payment, potentially causing financial loss and unauthorized paid-content access.

The vulnerability exists due to a time-of-check time-of-use race condition in plugin/PayPalYPT/ipn.php when checking deduplication keys and inserting transaction records nonatomically without a unique constraint on recurring_payment_id. A remote user can concurrently replay a captured valid PayPal recurring-payment notification to trigger duplicate wallet credits and subscription renewals.


Remediation

Install update from vendor's website.

References