ThorVG: Heap buffer overflow (OOB write) in bundled jpgd JPEG decoder

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123367
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-09 18:17:25 UTC
Updated2026-11-09 18:17:25 UTC
DescriptionThor 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

Problem Types: CWE-787 | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
3.1CNADECLARED7.4HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Thorvg Thorvg affected < 1.1.2 Not specified

References

ReferenceSourceLinkTags
github.com/thorvg/thorvg/security/advisories/GHSA-mw4c-w54x-248r [email protected] github.com
github.com/thorvg/thorvg/commit/67680c546d38d817e42eb7583dac8d87a4a319b5 [email protected] github.com
github.com/thorvg/thorvg/commit/e740313029dd427d1ebd9f53f300da71363f80ce [email protected] github.com
github.com/thorvg/thorvg/releases/tag/v1.1.2 [email protected] github.com
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