From 535f064c364064e511aff61cdb029dbe139baea5 Mon Sep 17 00:00:00 2001
From: zer0x64 <dugre.philippe@hotmail.com>
Date: Sun, 5 Apr 2026 14:52:30 -0400
Subject: [PATCH] allow omitting cfss on 0 flag

---
 ctf/templates/init/schemas/track.yaml.json | 14 +++++++++++++-
 ctf/validators.py                          |  3 +++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/ctf/templates/init/schemas/track.yaml.json b/ctf/templates/init/schemas/track.yaml.json
index 404d9fa..871e559 100644
--- a/ctf/templates/init/schemas/track.yaml.json
+++ b/ctf/templates/init/schemas/track.yaml.json
@@ -239,7 +239,19 @@
         "items": {
           "description": "A flag definition.",
           "type": "object",
-          "required": ["flag", "value", "return_string"],
+          "if": {
+            "properties": {
+              "value": {
+                "const": 0
+              }
+            }
+          },
+          "then": {
+            "required": ["flag", "value", "return_string"]
+          },
+          "else": {
+            "required": ["flag", "value", "return_string", "cfss"]
+          },
           "additionalProperties": false,
           "properties": {
             "flag": {
diff --git a/ctf/validators.py b/ctf/validators.py
index f1e7c35..edef761 100644
--- a/ctf/validators.py
+++ b/ctf/validators.py
@@ -487,6 +487,9 @@ def validate(self, track_name: str) -> list[ValidationError]:
 
         track_yaml = parse_track_yaml(track_name=track_name)
         for flag in track_yaml["flags"]:
+            # We don't need a CVSS if the flag value is 0
+            if flag.get("value") == 0:
+                continue
             if "cfss" not in flag:
                 errors.append(
                     ValidationError(