Deserialization of Untrusted Data in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.
BIT-gitlab-2026-87719
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:BIT-gitlab-2026-87719
gitlab
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 19.1.8
Source reference:
/affected/0/ranges19.2.6Source reference:
/affected/0/ranges19.3.2Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "18.3.0"
},
{
"fixed": "19.1.8"
},
{
"introduced": "19.2.0"
},
{
"fixed": "19.2.6"
},
{
"introduced": "19.3.0"
},
{
"fixed": "19.3.2"
}
]
}
],
"package": {
"name": "gitlab",
"purl": "pkg:bitnami/gitlab",
"ecosystem": "Bitnami"
},
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
}
],
"database_specific": {
"source": "https://github.com/bitnami/vulndb/tree/main/data/gitlab/BIT-gitlab-2026-87719.json"
}
}
]- Related CVEs
- CVE-2026-87719
Source reference:
/aliases
Publisher severity
critical
Source reference: /database_specific/severity
- Event
- #15217 · Revision 1
- Added to Heist Feed
- Publisher date