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Description

GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.

PUBLISHED Reserved 2026-04-23 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitLab




HIGH: 8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

13.11 (semver) before 18.11.7
affected

19.0 (semver) before 19.0.4
affected

19.1 (semver) before 19.1.2
affected

Credits

Thanks [yvvdwf](https://hackerone.com/yvvdwf) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/work_items/597887

hackerone.com/reports/3682085 (HackerOne Bug Bounty Report #3682085) technical-description exploit permissions-required

docs.gitlab.com/...hes/patch-release-gitlab-19-1-2-released/

cve.org (CVE-2026-6896)

nvd.nist.gov (CVE-2026-6896)

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