Unauthenticated payment completion via forged webhooks
Published Aug 22, 2026 · Updated Aug 22, 2026
Webhook authentication bypass in Conekta Payment Gateway before 6.2.2 allows remote attackers to mark arbitrary WooCommerce orders as paid. The order.paid handler accepts unverified notifications and trusts an attacker-selected order without checking the API-confirmed order, amount, or currency. No authentication is required; a forged callback changes order state without a corresponding payment.
Summary
What happened
Webhook authentication bypass in Conekta Payment Gateway before 6.2.2 allows remote attackers to mark arbitrary WooCommerce orders as paid. The order.paid handler accepts unverified notifications and trusts an attacker-selected order without checking the API-confirmed order, amount, or currency. No authentication is required; a forged callback changes order state without a corresponding payment.
The record
- CVE
- CVE-2026-16738
- Published
- Aug 22, 2026
- Updated
- Aug 22, 2026
- Vendor
- Conekta
- Product
- Conekta Payment Gateway
- Classifications
- CWE-284, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 22, 2026CVE publishedPublication date reported by the CVE source.
- Aug 22, 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 <6.2.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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