From e51546cd4233c92677fd336bf4aebdba218dac32 Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Wed, 15 Apr 2026 15:30:27 +0200
Subject: [PATCH 1/4] Add vpatch-CVE-2026-21643 rule

---
 .../crowdsecurity/vpatch-CVE-2026-21643.yaml  | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 appsec-rules/crowdsecurity/vpatch-CVE-2026-21643.yaml

diff --git a/appsec-rules/crowdsecurity/vpatch-CVE-2026-21643.yaml b/appsec-rules/crowdsecurity/vpatch-CVE-2026-21643.yaml
new file mode 100644
index 00000000000..a7c4f33f283
--- /dev/null
+++ b/appsec-rules/crowdsecurity/vpatch-CVE-2026-21643.yaml
@@ -0,0 +1,33 @@
+## autogenerated on 2026-04-15 13:30:23
+name: crowdsecurity/vpatch-CVE-2026-21643
+description: 'Detects SQL injection in Fortinet FortiClientEMS via the Site HTTP header on /api/v1/init_consts.'
+rules:
+  - and:
+      - zones:
+          - URI
+        transform:
+          - lowercase
+        match:
+          type: contains
+          value: /api/v1/init_consts
+      - zones:
+          - HEADERS
+        variables:
+          - site
+        transform:
+          - lowercase
+        match:
+          type: contains
+          value: ';'
+
+labels:
+  type: exploit
+  service: http
+  confidence: 3
+  spoofable: 0
+  behavior: 'http:exploit'
+  label: 'FortiClientEMS - SQLI'
+  classification:
+    - cve.CVE-2026-21643
+    - attack.T1190
+    - cwe.CWE-89

From c92c2854628d52969a3ee63f20af9ee8db7c22cf Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Wed, 15 Apr 2026 15:30:30 +0200
Subject: [PATCH 2/4] Add vpatch-CVE-2026-21643 test config

---
 .appsec-tests/vpatch-CVE-2026-21643/config.yaml | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .appsec-tests/vpatch-CVE-2026-21643/config.yaml

diff --git a/.appsec-tests/vpatch-CVE-2026-21643/config.yaml b/.appsec-tests/vpatch-CVE-2026-21643/config.yaml
new file mode 100644
index 00000000000..157a2509083
--- /dev/null
+++ b/.appsec-tests/vpatch-CVE-2026-21643/config.yaml
@@ -0,0 +1,5 @@
+## autogenerated on 2026-04-15 13:30:23
+appsec-rules:
+  - ./appsec-rules/crowdsecurity/base-config.yaml
+  - ./appsec-rules/crowdsecurity/vpatch-CVE-2026-21643.yaml
+nuclei_template: CVE-2026-21643.yaml

From 59efb09f194fe015c2b537000e365caf635f797d Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Wed, 15 Apr 2026 15:30:32 +0200
Subject: [PATCH 3/4] Add CVE-2026-21643.yaml test

---
 .../vpatch-CVE-2026-21643/CVE-2026-21643.yaml | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 .appsec-tests/vpatch-CVE-2026-21643/CVE-2026-21643.yaml

diff --git a/.appsec-tests/vpatch-CVE-2026-21643/CVE-2026-21643.yaml b/.appsec-tests/vpatch-CVE-2026-21643/CVE-2026-21643.yaml
new file mode 100644
index 00000000000..f1fde85d097
--- /dev/null
+++ b/.appsec-tests/vpatch-CVE-2026-21643/CVE-2026-21643.yaml
@@ -0,0 +1,19 @@
+## autogenerated on 2026-04-15 13:30:23
+id: CVE-2026-21643
+info:
+  name: CVE-2026-21643
+  author: crowdsec
+  severity: info
+  description: CVE-2026-21643 testing
+  tags: appsec-testing
+http:
+  - raw:
+      - |
+        GET /api/v1/init_consts HTTP/1.1
+        Host: {{Hostname}}
+        Site: tenant1; SELECT pg_sleep(8)--
+    cookie-reuse: true
+    matchers:
+    - type: status
+      status:
+       - 403

From ada7e98eb22831d93ffd4934612cbfbb6689ff4c Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Wed, 15 Apr 2026 15:30:34 +0200
Subject: [PATCH 4/4] Add vpatch-CVE-2026-21643 rule to vpatch collection

---
 collections/crowdsecurity/appsec-virtual-patching.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/collections/crowdsecurity/appsec-virtual-patching.yaml b/collections/crowdsecurity/appsec-virtual-patching.yaml
index 7ccf9a8bf03..d51e4cbed1c 100644
--- a/collections/crowdsecurity/appsec-virtual-patching.yaml
+++ b/collections/crowdsecurity/appsec-virtual-patching.yaml
@@ -122,6 +122,7 @@ appsec-rules:
 - crowdsecurity/vpatch-CVE-2019-5418
 - crowdsecurity/vpatch-CVE-2025-52488
 - crowdsecurity/vpatch-CVE-2025-49132
+- crowdsecurity/vpatch-CVE-2026-21643
 - crowdsecurity/vpatch-CVE-2025-47812
 - crowdsecurity/vpatch-CVE-2024-51977
 - crowdsecurity/vpatch-CVE-2022-31499