Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
OctoRPKI (Go package github.com/cloudflare/cfrpki) versions before 1.4.4 crash when a chain of certificate authorities exceeds the maximum iteration limit during validation. An attacker who can create long chains of CAs can trigger the crash, which stops validation and causes a denial of service. Upgrade to version 1.4.4. The source lists no workaround.
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 |
|---|---|---|---|---|
| 5.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:H | CNA (cloudflare) |
- CISA KEV Not listed.
- EPSS 0.0053, the 44th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV