x-image-bmp up to 0.40.x on Go BMP File array index

Summaryinfo

A vulnerability, which was classified as critical, has been found in x-image-bmp up to 0.40.x on Go. This affects an unknown function of the component BMP File Handler. This manipulation causes array index. This vulnerability is registered as CVE-2026-42500. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in x-image-bmp up to 0.40.x on Go and classified as critical. Affected by this vulnerability is an unknown functionality of the component BMP File Handler. The manipulation with an unknown input leads to a array index vulnerability. The CWE definition for the vulnerability is CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Decoding a paletted BMP file with an out-of-range palette index results in a panic when accessing pixels in the invalid image.

It is possible to read the advisory at go.dev. This vulnerability is known as CVE-2026-42500 since 04/28/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 318019 (Linux Distros Unpatched Vulnerability : CVE-2026-42500), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.41.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318019), EUVD (EUVD-2026-33419) and CERT Bund (WID-SEC-2026-1653). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• IBM MQ
• Golang Go
• SUSE openSUSE
• Red Hat OpenShift

Productinfo

Name

• x-image-bmp

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40

CPE 2.3info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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