CVE-2026-0595 | THREATINT

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.9 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that, under certain conditions could have allowed an authenticated user to add unauthorized email addresses to victim accounts through HTML injection in test case titles.

PUBLISHED Reserved 2026-01-05 | Published 2026-02-11 | Updated 2026-02-12 | Assigner GitLab

HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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

13.9 (semver) before 18.6.6

affected

18.7 (semver) before 18.7.4

affected

18.8 (semver) before 18.8.4

affected

Credits

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

References

gitlab.com/gitlab-org/gitlab/-/issues/584975 (GitLab Issue #584975) issue-tracking permissions-required

hackerone.com/reports/3486862 (HackerOne Bug Bounty Report #3486862) technical-description exploit permissions-required

about.gitlab.com/...10/patch-release-gitlab-18-8-4-released/

cve.org (CVE-2026-0595)

nvd.nist.gov (CVE-2026-0595)

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