SB2026110943 - Information Exposure Through Timing Discrepancy in Pay

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026110943

SB2026110943 - Information Exposure Through Timing Discrepancy in Pay

Published: November 9, 2026

Security Bulletin ID SB2026110943
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Information Exposure Through Timing Discrepancy (CVE-ID: CVE-2026-70658)

CWE-ID: CWE-208 - Information Exposure Through Timing Discrepancy

CVSSv4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows an unauthenticated remote attacker to forge Paddle Billing webhook events and alter application billing state.

The vulnerability exists due to a non-constant-time HMAC comparison in Pay's Paddle Billing webhook signature verifier, exposing timing differences when Paddle Billing is enabled and signature guesses are submitted. An unauthenticated remote attacker can repeatedly probe /pay/webhooks/paddle_billing and measure response times to recover a valid signature, allowing forged events to pass verification and trigger billing updates.


Remediation

Install update from vendor's website.

References