(CVE-2026-1554)
Vulnerability from drupal – Published: 2026-01-28 17:29 – Updated: 2026-01-28 17:29 – Source websiteThis module enables you to turn a Drupal install into the Central Authentication System (CAS). It makes your database the primary location for other systems to use for authentication in a SSO environment.
The module doesn't sufficiently sanitize user-supplied field values configured to be included as attributes in a CAS server response.
This vulnerability is mitigated by the fact that an attacker must be authenticated, have the ability to enter XML into a user entity field, and that field be configured as a CAS Attribute source leading to an XML Element Injection vulnerability.
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"affected_versions": "\u003c2.0.3 || \u003e=2.1.0 \u003c2.1.2"
},
"package": {
"ecosystem": "Packagist:https://packages.drupal.org/8",
"name": "drupal/cas_server"
},
"ranges": [
{
"database_specific": {
"constraint": "\u003c2.0.3"
},
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.3"
}
],
"type": "ECOSYSTEM"
},
{
"database_specific": {
"constraint": "\u003e=2.1.0 \u003c2.1.2"
},
"events": [
{
"introduced": "2.1.0"
},
{
"fixed": "2.1.2"
}
],
"type": "ECOSYSTEM"
}
],
"severity": []
}
],
"aliases": [
"CVE-2026-1554"
],
"credits": [
{
"contact": [
"https://www.drupal.org/u/ga%C3%ABlg"
],
"name": "Ga\u00ebl Gosset (ga\u00eblg)"
}
],
"details": "This module enables you to turn a Drupal install into the Central Authentication System (CAS). It makes your database the primary location for other systems to use for authentication in a SSO environment.\n\nThe module doesn\u0027t sufficiently sanitize user-supplied field values configured to be included as attributes in a CAS server response.\n\nThis vulnerability is mitigated by the fact that an attacker must be authenticated, have the ability to enter XML into a user entity field, and that field be configured as a CAS Attribute source leading to an XML Element Injection vulnerability.",
"id": "DRUPAL-CONTRIB-2026-007",
"modified": "2026-01-28T17:29:32.000Z",
"published": "2026-01-28T17:29:32.000Z",
"references": [
{
"type": "WEB",
"url": "https://www.drupal.org/sa-contrib-2026-007"
}
],
"schema_version": "1.7.0"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.