imgproxy up to 4.0.15 ICO Loader vips/icoload.c data_size integer overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in imgproxy up to 4.0.15. This issue affects some unknown processing of the file vips/icoload.c of the component ICO Loader. The manipulation of the argument data_size leads to integer overflow. This vulnerability is referenced as CVE-2026-123614. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in imgproxy up to 4.0.15. It has been rated as critical. This issue affects an unknown functionality of the file vips/icoload.c of the component ICO Loader. The manipulation of the argument data_size with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

imgproxy from 4.0.0 before 4.0.16 contains an integer overflow in the ICO loader that allows remote attackers to trigger a heap buffer overflow via a crafted data_size value. Attackers can submit a crafted ICO image whose data_size wraps the allocation in vips/icoload.c, corrupting heap memory to crash the process or achieve code execution.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-123614 since 11/06/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.0.16 eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Name

• imgproxy

Version

• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.0.6
• 4.0.7
• 4.0.8
• 4.0.9
• 4.0.10
• 4.0.11
• 4.0.12
• 4.0.13
• 4.0.14
• 4.0.15

Website

• Product: https://github.com/imgproxy/imgproxy/

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