Description
SGLang allows unauthenticated pickle deserialization through /update_weights_from_tensor when no auth keys are configured, and the SafeUnpickler policy can be bypassed because builtins.import and builtins.getattr are resolvable, enabling code execution via pickle REDUCE.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SGLang | SGLang | ≤ 0.5.18 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-sglang | 0.5.20-1.1 | openSUSE-SU-2026:11865-1 |
Advisories 1
- openSUSE-SU-2026:11865-1 python313-sglang-0.5.20-1.1 on GA media SUSE / openSUSE Security Updates · Sep 24, 2026