Quick answers
- Is CVE-2026-70659 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-70659 being exploited in the wild.
- How severe is CVE-2026-70659?
- High severity, with a CVSS score of 7.8, published 5 November 2026.
- Which products and versions are affected?
- Leejet Stable-Diffusion.Cpp master-742-1a13107 until master-763-4fcc6fe.
- Is there a fix for CVE-2026-70659?
- Yes: fixed in master-763-4fcc6fe. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-70659 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-70659?
- Check whether you run Leejet Stable-Diffusion.Cpp 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: master-763-4fcc6fe
Technical details
A heap out-of-bounds write occurs in IMatrixCollector::load_imatrix (src/runtime/imatrix.cpp) when processing a .imatrix file with duplicate tensor entries that have mismatched value counts. The vulnerable code resizes vectors only on the first occurrence of a name, then writes beyond the allocated buffer when a second entry with the same name but larger nval is encountered. Local file input via the --imat-in conversion path is the attack vector; no authentication or network access is required.
Affected products
- leejet stable-diffusion.cpp master-742-1a13107 until master-763-4fcc6fe
Timeline
- 2026-11-05: disclosed
- 2026-07-06: patched