ThorVG up to 1.1.1 JPEG decoder tvgJpgd.cpp heap-based overflow

Summaryinfo

A vulnerability was found in ThorVG up to 1.1.1 and classified as problematic. This issue affects some unknown processing of the file src/loaders/jpg/tvgJpgd.cpp of the component JPEG decoder. The manipulation results in heap-based overflow. This vulnerability is identified as CVE-2026-123367. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in ThorVG up to 1.1.1. Affected is an unknown code of the file src/loaders/jpg/tvgJpgd.cpp of the component JPEG decoder. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. The product writes past the end of a buffer that was allocated on the heap. This is going to have an impact on availability. CVE summarizes:

Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.1.2, the bundled jpgd JPEG decoder accepts duplicate component selectors in an SOS scan header, causing each duplicate to increase m_blocks_per_mcu without checking the buffers sized from the frame components. A crafted grayscale JPEG can repeat its component in the SOS header, causing decode paths in src/loaders/jpg/tvgJpgd.cpp to write beyond heap buffers sized for one component. The issue is reachable through direct JPEG decoding and through JPEG images embedded in Lottie content, and confirmed impact is memory corruption followed by a process crash. This issue is fixed in version 1.1.2.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-123367 since 11/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 1.1.2 eliminates this vulnerability.

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Productinfo

Name

• ThorVG

Version

• 1.1.0
• 1.1.1

Website

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

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