False payment registration via timing-variable integrity check
Published Sep 2, 2026 · Updated Sep 2, 2026
Timing side channel in Drupal Commerce CyberSource before 1.10.0 allows remote attackers to register unpaid orders as paid. The Secure Acceptance Hosted Checkout response handler verifies provider-returned integrity data with a timing-variable comparison. Exploitation requires repeated, precisely timed checkout responses and changes payment state without reported data disclosure or service interruption.
Summary
What happened
Timing side channel in Drupal Commerce CyberSource before 1.10.0 allows remote attackers to register unpaid orders as paid. The Secure Acceptance Hosted Checkout response handler verifies provider-returned integrity data with a timing-variable comparison. Exploitation requires repeated, precisely timed checkout responses and changes payment state without reported data disclosure or service interruption.
The record
- CVE
- CVE-2026-81159
- Published
- Sep 2, 2026
- Updated
- Sep 2, 2026
- Vendor
- OAuth.js
- Product
- Commerce CyberSource
- Classifications
- CWE-208, CAPEC-112
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 2, 2026CVE publishedPublication date reported by the CVE source.
- Sep 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.0 <1.10.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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