Memory Allocation with Excessive Size Value Affecting github.com/openziti/zrok/v2/endpoints/publicproxy package, versions <2.0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Apr 2026
- disclosed17 Apr 2026
- creditUnknown
Introduced: 17 Apr 2026
CVE-2026-40303 Â (opens in a new tab)How to fix?
Upgrade github.com/openziti/zrok/v2/endpoints/publicProxy to version 2.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value via the endpoints.GetSessionCookie function. An attacker can exhaust system memory resources by sending specially crafted requests containing a large cookie chunk count, resulting in unbounded memory allocation before any token validation occurs. This can lead to process termination or repeated panics.