Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The github.com/go-kratos/kratos/v2 package, versions up to and including 2.9.2, has a confused deputy flaw in its HTTP server's fallback handling for http.DefaultServeMux. A remote attacker can cause the server to act as an unintended intermediary. The source gives few details on the exact impact. No fixed version is listed, so check the upstream project for a patched release.
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 |
|---|---|---|---|---|
| 6.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P | CNA (VulDB) |
- CISA KEV Not listed.
- EPSS 0.0032, the 24th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:57 UTC First seen by agentprime
- 31 Oct 2026, 14:57 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-jj45-xvq5-rhh9
- OSV: GHSA-jj45-xvq5-rhh9
- nvd.nist.gov/vuln/detail/CVE-2026-6993
- github.com/go-kratos/kratos/issues/3810
- github.com/go-kratos/kratos/pull/3814
- github.com/Yanhu007/kratos/commit/0284a5bcf92b5a7ee015300ce3051baf7ae4718d
- github.com/go-kratos/kratos
- vuldb.com/submit/797099
- vuldb.com/vuln/359545
- vuldb.com/vuln/359545/cti