Description
A security flaw has been discovered in vllm-project vLLM up to 0.29.0. The affected element is the function TiktokenTokenizer::new of the file rust/src/text/src/backend/hf/mod.rs of the component tiktoken vocab File Handler. The manipulation results in denial of service. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| vllm-project | vLLM | 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29.0 | — |
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-vllm | 0.30.0-1.1 | openSUSE-SU-2026:11867-1 |
Advisories 1
- openSUSE-SU-2026:11867-1 python313-vllm-0.30.0-1.1 on GA media SUSE / openSUSE Security Updates · Sep 24, 2026
References
- VDB-403267 | vllm-project vLLM tiktoken vocab File mod.rs new denial of service vdb-entry technical-description
- VDB-403267 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-90713 | CVE Analysis and Report third-party-advisory
- Submit #918762 | vLLM Project (vllm-project) vLLM v0.26.0 Denial of Service third-party-advisory
- https://github.com/vllm-project/vllm/issues/50954 issue-tracking
- https://github.com/vllm-project/vllm/pull/51135 issue-tracking patch
- https://gist.github.com/Yunzez/4b08ec3568a8cbfb120062e2558382b8 exploit
- https://github.com/vllm-project/vllm/ product