Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The flyto-core package, versions before 2.26.3, has an SSRF guard (validate_url_ssrf) that fails to block private and metadata addresses written in IPv6 transition forms such as IPv4-mapped, 6to4 and NAT64 addresses. An authenticated user who can author or run workflows can use the http.get module and related modules to fetch internal services, including loopback and cloud metadata endpoints, and receive the response body. Upgrade to flyto-core 2.26.3 or later, which contains the fix.
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 |
|---|---|---|---|---|
| 7.1 | High | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0029, the 22nd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:02 UTC First seen by agentprime
- 31 Oct 2026, 15:02 UTC Confirmed by OSV