Bug 2533014 (CVE-2026-90713)

Summary: CVE-2026-90713 vllm: tiktoken: vLLM and tiktoken: Local Denial of Service vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: alinfoot, anpicker, bbrownin, blitton, dfreiber, drow, dschmidt, dtrifiro, ebourniv, hasun, ikhan, ilpinto, jburrell, jfula, jlanda, jowilson, jwong, kshier, ltomasbo, mbarnett, nyancey, omaciel, ometelka, ptisnovs, rbobbitt, rjohnson, sbunciak, simaishi, stcannon, syedriko, vkumar, weaton, xdharmai, yguenane, ykashtan
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vLLM and tiktoken. A local attacker can exploit a vulnerability within the `TiktokenTokenizer::new` function of the tiktoken vocab File Handler component. This can lead to a denial of service, making the affected system unavailable.
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Description OSIDB Bzimport 2026-09-14 12:37:00 UTC 
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.