CVE-2026-15976 CVE-2026-15976
Attackers can execute arbitrary code by loading malicious model weights from a HuggingFace repository due to unsafe pickle deserialization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15976?
CVE-2026-15976 is a critical unsafe deserialization vulnerability in SGLang, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SGLang contains a RCE vulnerability when attempting to load model weights from a HuggingFace repository, specifically within the /update_weights_from_disk, where torch.load(..., weights_only=False) fallback enables pickle deserialization of .bin files.
Weakness: CWE-502
Which versions are affected by CVE-2026-15976?
It affects 1 product.
Products include Lmsys Sglang.
How do I fix CVE-2026-15976?
No fix has been published for CVE-2026-15976 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-15976 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15976 exists.
Other vulnerabilities in SGLang
Sources
Also known as GHSA-r344-357p-w9pp, GHSA-wf98-gv64-5wrf.