Quick answers
- Is CVE-2026-47749 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-47749 being exploited in the wild.
- How severe is CVE-2026-47749?
- High severity, with a CVSS score of 7.8, published 16 June 2026.
- Which products and versions are affected?
- Leejet Stable-Diffusion.Cpp prior to master-584-0a7ae07.
- Is there a fix for CVE-2026-47749?
- A patch was published on 2026-04-19: Fix committed in master-584-0a7ae07 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-47749 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-47749?
- 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.
Technical details
A heap-based buffer overflow exists in the SHORT_BINUNICODE opcode handler within the pickle .ckpt parser in src/model.cpp. The vulnerability is caused by sign confusion where a one-byte length field is read as a signed 8-bit integer (int8_t). An attacker can provide a value such as 0xFF, which is interpreted as -1, bypassing length checks (e.g., -1 < 512) before being passed to memcpy as a size_t. This results in a massive memory copy (SIZE_MAX), leading to immediate heap corruption. Exploitation requires a user to load a specially crafted .ckpt file. The issue is fixed in version master-584-0a7ae07.
Affected products
- leejet stable-diffusion.cpp prior to master-584-0a7ae07
Timeline
- 2026-04-19: patched: Fix committed in master-584-0a7ae07
- 2026-05-22: advisory: GitHub Security Advisory published
- 2026-06-16: disclosed: CVE-2026-47749 published to NVD