CVE-2026-123367
Published:November 09, 2026
Updated:November 10, 2026
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.
Affected Packages
https://github.com/thorvg/thorvg.git (GITHUB):
Affected version(s) >=v0.6.0 <v1.1.2 || >=v1.0-pre1 <v1.1.2 || >=v1.0.0 <v1.1.2Fix Suggestion:
Update to version v1.1.2@thorvg/webcanvas (NPM):
Affected version(s) >=1.0.0 <1.1.2Fix Suggestion:
Update to version 1.1.2@thorvg/lottie-player (NPM):
Affected version(s) >=1.0.0-pre.1 <1.1.2Fix Suggestion:
Update to version 1.1.2Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
HIGH
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write