CVE-2026-40303
zrok: Unauthenticated DoS via unbounded memory allocation in striped session cookie parsing in github.com/openziti/zrok
7.5
HIGH
CVSS 3.1
EPSS 0.45%
Description
zrok: Unauthenticated DoS via unbounded memory allocation in striped session cookie parsing in github.com/openziti/zrok
How to fix CVE-2026-40303
To remediate CVE-2026-40303, upgrade the affected package to a fixed version below.
- Go/github.com/openziti/zrok—no fix listed
- —no fix listed
- —upgrade to 2.0.1 or later
- —upgrade to 2.0.1 or later
Is CVE-2026-40303 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, <= 1.1.11
- from 0
- from 0, < 2.0.1
- from 0, < 2.0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |