CVE-2026-54236 Details.
vLLM <= 0.23.0 - Anthropic Router Heap Address Information Leak
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-54236. What It Means.
vLLM <= 0.23.0 incompletely fixes CVE-2026-22778. The original fix added sanitize_message to the OpenAI router but the Anthropic-compatible router (/v1/messages) echoes str(exc) directly.
Affected Product. What Is Hit.
- Vendor
- vllm
- Product
- vLLM
References. Where To Read More.
FAQ
Common Questions.
vLLM <= 0.23.0 - Anthropic Router Heap Address Information Leak. vLLM <= 0.23.0 incompletely fixes CVE-2026-22778. The original fix added sanitize_message to the OpenAI router but the Anthropic-compatible router (/v1/messages) echoes str(exc) directly.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-54236 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-54236 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update vLLM to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-54236. Atlas does not run a check for it, so nothing here says whether a particular site is affected.