Quick answers
- Is CVE-2026-58496 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58496 being exploited in the wild.
- How severe is CVE-2026-58496?
- Medium severity, with a CVSS score of 4.3, published 27 October 2026.
- Which products and versions are affected?
- ThorVG before 1.0.7.
- Is there a fix for CVE-2026-58496?
- Yes: fixed in 1.0.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-58496 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-58496?
- Check whether you run ThorVG at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 1.0.7
Technical details
The SfntLoader::gen function in tvgSfntLoader.cpp reads bytes 0–3 from an input buffer to identify the font type without first validating that the buffer contains at least 4 bytes. This out-of-bounds read occurs when loading fonts via tvg::Text::load or equivalent APIs; file-based loading with mmap may avoid exposure due to page alignment. An attacker providing a crafted undersized font can trigger information disclosure or denial of service depending on adjacent memory layout.
Affected products
- ThorVG ThorVG before 1.0.7
Timeline
- 2026-10-27: disclosed