diff --git a/cmd/root/eval.go b/cmd/root/eval.go
index 4b3183c20..8f3fc6df6 100644
--- a/cmd/root/eval.go
+++ b/cmd/root/eval.go
@@ -43,6 +43,7 @@ func newEvalCmd() *cobra.Command {
 	cmd.Flags().StringSliceVar(&flags.Only, "only", nil, "Only run evaluations with file names matching these patterns (can be specified multiple times)")
 	cmd.Flags().StringVar(&flags.BaseImage, "base-image", "", "Custom base Docker image for running evaluations")
 	cmd.Flags().BoolVar(&flags.KeepContainers, "keep-containers", false, "Keep containers after evaluation (don't use --rm)")
+	cmd.Flags().StringSliceVarP(&flags.EnvVars, "env", "e", nil, "Environment variables to pass to container (KEY or KEY=VALUE)")
 
 	return cmd
 }
diff --git a/pkg/evaluation/eval.go b/pkg/evaluation/eval.go
index 69258b765..a8b036c82 100644
--- a/pkg/evaluation/eval.go
+++ b/pkg/evaluation/eval.go
@@ -372,6 +372,18 @@ func (r *Runner) runCagentInContainer(ctx context.Context, imageID, question str
 		}
 	}
 
+	// Pass additional environment variables specified via -e flag
+	// Format: KEY or KEY=VALUE
+	for _, entry := range r.EnvVars {
+		if key, val, hasValue := strings.Cut(entry, "="); hasValue && key != "" {
+			args = append(args, "-e", key)
+			env = append(env, key+"="+val)
+		} else if val, ok := r.runConfig.EnvProvider().Get(ctx, entry); ok && entry != "" {
+			args = append(args, "-e", entry)
+			env = append(env, entry+"="+val)
+		}
+	}
+
 	args = append(args, imageID, "/configs/"+agentFile, question)
 
 	cmd := exec.CommandContext(ctx, "docker", args...)
diff --git a/pkg/evaluation/types.go b/pkg/evaluation/types.go
index e69fc9768..b4f6aa60f 100644
--- a/pkg/evaluation/types.go
+++ b/pkg/evaluation/types.go
@@ -120,6 +120,7 @@ type Config struct {
 	Only           []string // Only run evaluations matching these patterns
 	BaseImage      string   // Custom base Docker image for running evaluations
 	KeepContainers bool     // If true, don't remove containers after evaluation (skip --rm)
+	EnvVars        []string // Environment variables to pass: KEY (value from env) or KEY=VALUE (explicit)
 }
 
 // Session helper functions