CVE-2026-16962Public exploitNetwork attack vector

Unauthenticated order status changes via unchecked identifiers

Published Aug 21, 2026 · Updated Aug 21, 2026

Missing authorization in Tamara Checkout 1.9.9.20 and earlier allows remote attackers to change arbitrary WooCommerce order statuses. The public tamara-payment-cancel and tamara-payment-fail handlers accept a numeric wcOrderId and update the matching order without checking its order key, a nonce, a request signature, or user capability. No account or user interaction is required; identifier enumeration can cancel or fail orders store-wide and trigger stock-release and notification side effects.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Tamara Checkout 1.9.9.20 and earlier allows remote attackers to change arbitrary WooCommerce order statuses. The public tamara-payment-cancel and tamara-payment-fail handlers accept a numeric wcOrderId and update the matching order without checking its order key, a nonce, a request signature, or user capability. No account or user interaction is required; identifier enumeration can cancel or fail orders store-wide and trigger stock-release and notification side effects.

The record

CVE
CVE-2026-16962
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Tamara
Product
Tamara Checkout
Classifications
CWE-862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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.

  1. Affected versionversion=0 <=1.9.9.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tamara · Tamara Checkoutversion=0 <=1.9.9.20

Published CVSS scores

5.3WPScan CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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