CVE-2026-90713 vllm-project vLLM tiktoken vocab File mod.rs new denial of service
Local attackers can cause a denial of service in vLLM via the tiktoken vocab file handler, requiring a patch for mitigation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90713?
CVE-2026-90713 is a medium-severity denial of service vulnerability in vllm-project vLLM, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-404
Which versions are affected by CVE-2026-90713?
How do I fix CVE-2026-90713?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-90713 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90713 exists.
Sources
Also known as GHSA-hvv2-qg7m-ffqp.