| Title | ntegrals OpenBrowser v1.0 Resource Exhaustion |
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| Description | OpenBrowser has a denial-of-service vulnerability in its browser-agent message construction path.
When OpenBrowser visits a web page, it serializes the page state into an LLM message before enforcing an effective hard size/token limit. An attacker-controlled page can place extremely large text inside a visible or accessibility-exposed element, such as a button or aria-label. During a normal task like "Summarize this page", OpenBrowser includes that untrusted page text in the model request.
This allows a single ordinary browser-agent workflow to generate an oversized LLM request that consumes the configured model provider or inference worker. Impact includes temporary denial of service of the LLM/model path, browser-agent task failure, increased CPU/memory usage, context-window errors, and potential denial-of-wallet on paid LLM providers. |
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| Source | ⚠️ https://github.com/outlookgp/CVE/tree/main/OpenBrowser_Message_Budget_DoS_Report |
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| User | outlookgp (UID 99658) |
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| Submission | 07/10/2026 17:29 (2 months ago) |
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| Moderation | 09/02/2026 13:50 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 398080 [ntegrals openbrowser up to 067fc45d649baa961750da8e2f4a75d87c5c75c8 Browser Agent Message Construction agent.ts resource consumption] |
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| Points | 20 |
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