Setasign FPDI up to 2.6.6 PDF File allocation of resources

Summaryinfo

A vulnerability classified as problematic was found in Setasign FPDI up to 2.6.6. This impacts an unknown function of the component PDF File Handler. Such manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-45802. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Setasign FPDI up to 2.6.6. It has been rated as problematic. Affected by this issue is an unknown function of the component PDF File Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

FPDI is a collection of PHP classes that facilitate reading pages from existing PDF documents and using them as templates in FPDF. Prior to version 2.6.7, an attacker can upload a small, malicious PDF file that will cause the server-side script to crash due to memory exhaustion or a script time-out. Repeated attacks can lead to sustained service unavailability. This issue has been patched in version 2.6.7.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-45802 since 05/13/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.6.7 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 1695cfcc7e01fe844a7296b3de90855a3fa65be6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36305). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Setasign

Name

• FPDI

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6

License

• open-source

Website

• Product: https://github.com/Setasign/FPDI/

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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