Medium severity · published Oct 21, 2026
CVE-2026-105777
Insertion of Sensitive Information Into Sent Data in GitLab
New
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
17.6.5 before 19.3.6; 19.4 before 19.4.3; 19.5 before 19.5.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105777
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105777
Release Notes
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
Permissions Required
https://gitlab.com/gitlab-org/gitlab/-/work_items/597022
Permissions Required
https://hackerone.com/reports/3657282
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