CVE-2026-15969 CVE-2026-15969
Unauthenticated attackers can execute arbitrary code via crafted pickle payloads in SGLang due to incomplete deserialization protections.
- 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-2026-15969?
CVE-2026-15969 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 an unauthenticated RCE in /load_lora_adapter_from_tensors via bypass of SafeUnpickler’s incomplete denylist, allowing arbitrary command execution through crafted base64-encoded pickle payloads.
Weakness: CWE-502
Which versions are affected by CVE-2026-15969?
It affects 1 product.
Products include Lmsys Sglang.
How do I fix CVE-2026-15969?
No fix has been published for CVE-2026-15969 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-2026-15969 being exploited?
There is no known exploitation of CVE-2026-15969 in the wild and no public exploit code.
Other vulnerabilities in SGLang
Sources
Also known as GHSA-2wvm-gjg7-5jfm, GHSA-359v-m36h-r94v.