From 239421162662a63abccf07f36037eb88d78cc537 Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Fri, 13 Nov 2026 10:03:57 +0100
Subject: [PATCH 1/5] Add vpatch-CVE-2026-28318 rule

---
 .../crowdsecurity/vpatch-CVE-2026-28318.yaml  | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.yaml

diff --git a/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.yaml b/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.yaml
new file mode 100644
index 00000000000..4f7c1656382
--- /dev/null
+++ b/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.yaml
@@ -0,0 +1,25 @@
+## autogenerated on 2026-11-13 09:03:53
+name: crowdsecurity/vpatch-CVE-2026-28318
+description: 'Detects requests using deflate content encoding, the attack indicator described for SolarWinds Serv-U CVE-2026-28318.'
+rules:
+  - zones:
+      - HEADERS
+    variables:
+      - Content-Encoding
+    transform:
+      - lowercase
+    match:
+      type: contains
+      value: 'deflate'
+
+labels:
+  type: exploit
+  service: http
+  confidence: 3
+  spoofable: 0
+  behavior: 'http:exploit'
+  label: 'SolarWinds Serv-U - DoS'
+  classification:
+    - cve.CVE-2026-28318
+    - attack.T1059
+    - cwe.CWE-400

From 651b19b37c3c70c7694fff88411b2934e5e7f55c Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Fri, 13 Nov 2026 10:03:59 +0100
Subject: [PATCH 2/5] Add vpatch-CVE-2026-28318 documentation

---
 appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.md | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.md

diff --git a/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.md b/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.md
new file mode 100644
index 00000000000..806ad1be557
--- /dev/null
+++ b/appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.md
@@ -0,0 +1,9 @@
+This rule provides virtual patching for **CVE-2026-28318**, a Parameter Injection vulnerability in **Serv-U** (SolarWinds), published on 2026-06-04, with a CVSS score of **7.5 (High)**.
+
+**Detection:** Detects requests using deflate content encoding, the attack indicator described for SolarWinds Serv-U CVE-2026-28318.
+
+Virtual patching mitigates exploitation attempts, but it does not fix the underlying vulnerability: upgrading Serv-U to a patched version is always recommended.
+
+### References
+- [CVE-2026-28318 on NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-28318)
+- [Exploit reference](https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-28318.yaml)

From dd2c051d1abc41ad5d028438043100d50d1ec097 Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Fri, 13 Nov 2026 10:04:02 +0100
Subject: [PATCH 3/5] Add vpatch-CVE-2026-28318 test config

---
 .appsec-tests/vpatch-CVE-2026-28318/config.yaml | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .appsec-tests/vpatch-CVE-2026-28318/config.yaml

diff --git a/.appsec-tests/vpatch-CVE-2026-28318/config.yaml b/.appsec-tests/vpatch-CVE-2026-28318/config.yaml
new file mode 100644
index 00000000000..860455246b1
--- /dev/null
+++ b/.appsec-tests/vpatch-CVE-2026-28318/config.yaml
@@ -0,0 +1,5 @@
+## autogenerated on 2026-11-13 09:03:53
+appsec-rules:
+  - ./appsec-rules/crowdsecurity/base-config.yaml
+  - ./appsec-rules/crowdsecurity/vpatch-CVE-2026-28318.yaml
+nuclei_template: CVE-2026-28318.yaml

From 0830c6a651fb929564dc9f3e0d8d78d8100992b6 Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Fri, 13 Nov 2026 10:04:04 +0100
Subject: [PATCH 4/5] Add CVE-2026-28318.yaml test

---
 .../vpatch-CVE-2026-28318/CVE-2026-28318.yaml | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 .appsec-tests/vpatch-CVE-2026-28318/CVE-2026-28318.yaml

diff --git a/.appsec-tests/vpatch-CVE-2026-28318/CVE-2026-28318.yaml b/.appsec-tests/vpatch-CVE-2026-28318/CVE-2026-28318.yaml
new file mode 100644
index 00000000000..785297ea367
--- /dev/null
+++ b/.appsec-tests/vpatch-CVE-2026-28318/CVE-2026-28318.yaml
@@ -0,0 +1,21 @@
+## autogenerated on 2026-11-13 09:03:53
+id: CVE-2026-28318
+info:
+  name: CVE-2026-28318
+  author: crowdsec
+  severity: info
+  description: CVE-2026-28318 testing
+  tags: appsec-testing
+http:
+  - raw:
+      - |
+        POST / HTTP/1.1
+        Host: {{Hostname}}
+        Content-Encoding: deflate
+        Content-Length: 0
+
+    cookie-reuse: true
+    matchers:
+      - type: status
+        status:
+          - 403

From bda296d4930ac6282d4fd501599bb0bbca701d60 Mon Sep 17 00:00:00 2001
From: crowdsec-automation
 <63358111+crowdsec-automation@users.noreply.github.com>
Date: Fri, 13 Nov 2026 10:04:07 +0100
Subject: [PATCH 5/5] Add vpatch-CVE-2026-28318 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 64873bfc20b..abb8bf1135e 100644
--- a/collections/crowdsecurity/appsec-virtual-patching.yaml
+++ b/collections/crowdsecurity/appsec-virtual-patching.yaml
@@ -146,6 +146,7 @@ appsec-rules:
 - crowdsecurity/vpatch-CVE-2023-6000
 - crowdsecurity/vpatch-CVE-2024-0204
 - crowdsecurity/vpatch-CVE-2020-25078
+- crowdsecurity/vpatch-CVE-2026-28318
 - crowdsecurity/vpatch-CVE-2023-23063
 - crowdsecurity/vpatch-CVE-2022-38627
 - crowdsecurity/vpatch-CVE-2025-36604