Snort - Network Intrusion Detection & Prevention System

Talos Rules 2026-05-21

This release adds and modifies rules in several categories.

Talos has added and modified multiple rules in the and server-webapp rule sets to provide coverage for emerging threats from these technologies.

For information about Snort Subscriber Rulesets available for purchase, please visit the Snort product page.

Change logs

29200

2026-05-21 13:53:38 UTC

Snort Subscriber Rules Update

Date: 2026-05-21

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2092000.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:66503 <-> DISABLED <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt (policy-other.rules)
 * 1:66504 <-> DISABLED <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt (server-webapp.rules)
 * 3:66505 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)
 * 3:66506 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)

Modified Rules:

29181

2026-05-21 13:53:38 UTC

Snort Subscriber Rules Update

Date: 2026-05-21

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2091801.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:66504 <-> DISABLED <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt (server-webapp.rules)
 * 1:66503 <-> DISABLED <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt (policy-other.rules)
 * 3:66506 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)
 * 3:66505 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)

Modified Rules:

29171

2026-05-21 13:53:38 UTC

Snort Subscriber Rules Update

Date: 2026-05-21

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2091701.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:66504 <-> DISABLED <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt (server-webapp.rules)
 * 1:66503 <-> DISABLED <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt (policy-other.rules)
 * 3:66505 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)
 * 3:66506 <-> ENABLED <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt (server-webapp.rules)

Modified Rules:

3200

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.2.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

3351

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.5.1.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

3360

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.6.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

3370

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.7.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

3700

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.7.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

3900

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.9.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31110

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.11.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31150

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.15.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31180

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.18.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31200

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.12.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31210

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.21.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31350

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.35.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31440

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.44.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31470

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.47.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31100

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.11.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt

Modified Rules:

31200

2026-05-21 13:56:52 UTC

Snort Subscriber Rules Update

Date: 2026-05-20-001

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.12.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301509 <-> SERVER-WEBAPP ArgoCD Kubernetes ServerSideDiff secrets disclosure attempt
* 1:66503 <-> POLICY-OTHER ArgoCD Kubernetes ServerSideDiff potential secrets disclosure attempt
* 1:66504 <-> SERVER-WEBAPP OSGeo GeoServer XML external entity injection attempt
* 3:66505 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt
* 3:66506 <-> SERVER-WEBAPP Cisco Secure Workload authentication bypass attempt