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 |
|---|---|---|---|---|
| 5.9 | Medium | 4.0 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N | CNA (EEF) |
- CISA KEV Not listed.
- EPSS 0.0040, the 34th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:25 UTC First seen by agentprime
- 31 Oct 2026, 15:25 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-3gww-3f36-2388
- OSV: GHSA-3gww-3f36-2388
- github.com/elixir-ecto/ecto/security/advisories/GHSA-3gww-3f36-2388
- cna.erlef.org/cves/CVE-2026-66838.html
- github.com/elixir-ecto/postgrex/commit/e1ecba618ddea4cee2556bd6ad9b6285e05f9d3c
- github.com/elixir-ecto/postgrex/commit/4011be852c99dc61ddb98cb01aa41e8775a0e3dd
- hex.pm/packages/postgrex