CVE-2026-123367 ThorVG: Heap buffer overflow (OOB write) in bundled jpgd JPEG decoder
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123367?
CVE-2026-123367 is a high-severity vulnerability in thorvg, published on 9 Nov 2026.
Official description
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.
Weakness: CWE-787
Which versions are affected by CVE-2026-123367?
How do I fix CVE-2026-123367?
No fix has been published for CVE-2026-123367 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123367 being exploited?
There is no known exploitation of CVE-2026-123367 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-123367, GHSA-mw4c-w54x-248r, UBUNTU-CVE-2026-123367.