Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Reflected cross-site scripting exists in the GitHub OAuth callback handlers of zrok, affecting github.com/openziti/zrok up to and including 1.1.11 (no fixed version listed) and github.com/openziti/zrok/v2 before 2.0.1. An attacker can send a victim a crafted login URL; when the victim completes the GitHub OAuth flow, injected JavaScript runs in the OAuth server's origin, with low confidentiality and integrity impact. Upgrade github.com/openziti/zrok/v2 to 2.0.1 or later; no fix is listed for github.com/openziti/zrok 1.1.11 and earlier.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.1 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0021, the 11th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:07 UTC First seen by agentprime
- 31 Oct 2026, 15:07 UTC Confirmed by OSV