Quarkus OpenAPI Generator is Quarkus' extensions for generation of Rest Clients and server stubs generation. Prior to versions 2.11.1-lts, 2.16.0-lts, and 2.17.0, the generated authentication filter matches OpenAPI path templates too broadly when deciding whether to attach credentials. A security scheme configured for one operation can therefore be applied to a different same-method operation whose path only partially resembles the protected template, causing bearer tokens, API keys, or basic credentials to be sent to unintended endpoints. This issue has been patched in versions 2.11.1-lts, 2.16.0-lts, and 2.17.0.
Affected: Maven: io.quarkiverse.openapi.generator:quarkus-openapi-generator
### Summary
The generated authentication filter matches OpenAPI path templates too broadly when deciding whether to attach credentials. A security scheme configured for one operation can therefore be applied to a different same-method operation whose path only partially resembles the protected template, causing bearer tokens, API keys, or basic credentials to be sent to unintended endpoints.
### Details
The runtime authentication layer selects credentials by comparing the outgoing request path and method against the set of protected OpenAPI operations. Path-template matching treats `{param}` placeholders as `.*`, which incorrectly allows a single path parameter to consume `/`.
As a result, a protected path such as `/repos/{ref}` also matches `/repos/foo/bar`, even though `/repos/{owner}/{repo}` is a different operation. When a client invokes the unprotected operation, the authentication filter still concludes that the protected operation matched and attaches its credentials.
This affects authentication providers that rely on the shared path-matching logic, including bearer, OAuth, API-key, and basic authentication. The issue is reachable through normal generated-client usage and does not require modifying generated code.
### PoC
```bash mkdir -p /tmp/qoag-poc/src/main/java/org/acme mkdir -p /tmp/qoag-poc/src/main/resources mkdir -p /tmp/qoag-poc/src/main/openapi
cat > /tmp/qoag-poc/pom.xml <<'EOF' <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi=…