LycheeOrg Lychee up to 7.6.x Payment Provider Validation isAllowed input validation

Summaryinfo

A vulnerability was found in LycheeOrg Lychee up to 7.6.x and classified as problematic. This issue affects the function OmnipayProviderType::isAllowed of the component Payment Provider Validation. The manipulation results in input validation. This vulnerability is reported as CVE-2026-77466. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in LycheeOrg Lychee up to 7.6.x. Affected is the function OmnipayProviderType::isAllowed of the component Payment Provider Validation. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on integrity. CVE summarizes:

Lychee is a free, open-source photo-management tool. Prior to 7.7.0, Lychee hides the Omnipay Dummy test provider from the checkout options in production through OmnipayFactory::get_supported_providers(), but CreateSessionRequest validates only that the submitted provider is an OmnipayProviderType and does not enforce OmnipayProviderType::isAllowed(). A buyer, including a guest when webshop_allow_guest_checkout is enabled, can submit Dummy directly and complete the test gateway flow without a real payment. When webshop_auto_fulfill_enabled is enabled, OrderCompletedListener::fullfillOrder() can then release the purchasable item. The issue requires access to the Supporter or Pro webshop and an enabled purchasable item. Testing bypassed the closed-source license middleware, so whether the real license layer performs additional payment-provider validation remains unverified. The payment finalize status check itself is not the root cause. This issue is fixed in version 7.7.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-77466 since 08/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

Upgrading to version 7.7.0 eliminates this vulnerability.

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Productinfo

Vendor

• LycheeOrg

Name

• Lychee

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6

Website

• Product: https://github.com/LycheeOrg/Lychee/

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