Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The io.github.robothy:local-s3-rest Maven package before 1.21 has an XML external entity (XXE) injection flaw in its bucket creation endpoint, which parses CreateBucketConfiguration XML and resolves external entities. An unauthenticated attacker who can send HTTP requests to the service can make it fetch internal URLs and return the responses in the bucket location, enabling server-side request forgery and information disclosure. Upgrade to version 1.21, which fixes the issue.
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 |
|---|---|---|---|---|
| 5.5 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0053, the 45th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:11 UTC First seen by agentprime
- 31 Oct 2026, 15:11 UTC Confirmed by OSV