CVE-2026-87719 GitLab EE - Information Disclosure

GitLab EE 18.3 < 19.1.8, 19.2 < 19.2.6, and 19.3 < 19.3.2 contain an information disclosure caused by bypassing serialization in GraphQL subscription arguments, letting authenticated users with Duo Chat access obtain sensitive Advanced Search configurations.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.57% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
12 September 2026
Updated
15 October 2026
Weakness
CWE-502

Vendor fix

Update to versions 19.1.8, 19.2.6, 19.3.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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