{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-8589: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-8589","status":"final","version":"1","initial_release_date":"2026-06-11T10:20:01.515Z","current_release_date":"2026-06-11T12:28:51.255Z","revision_history":[{"date":"2026-06-11T10:20:01.515Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"GitLab has remediated an issue in GitLab EE affecting all versions from 13.1.4 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to add unauthorized email addresses to a targeted user's account due to improper sanitization of user-supplied input in certain group setting fields.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-8589 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-8589"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-8589"},{"category":"external","summary":"gitlab.com","url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/600099"},{"category":"external","summary":"HackerOne Bug Bounty Report #3722842","url":"https://hackerone.com/reports/3722842"},{"category":"external","summary":"about.gitlab.com","url":"https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/"}]},"product_tree":{"branches":[{"category":"vendor","name":"GitLab","branches":[{"category":"product_name","name":"GitLab","branches":[{"category":"product_version_range","name":">=13.1.4 <18.10.8","product":{"name":"GitLab GitLab >=13.1.4 <18.10.8","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=18.11 <18.11.5","product":{"name":"GitLab GitLab >=18.11 <18.11.5","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=19.0 <19.0.2","product":{"name":"GitLab GitLab >=19.0 <19.0.2","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-8589","title":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab","notes":[{"category":"description","text":"GitLab has remediated an issue in GitLab EE affecting all versions from 13.1.4 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to add unauthorized email addresses to a targeted user's account due to improper sanitization of user-supplied input in certain group setting fields.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N","baseScore":7.3,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 18.10.8, 18.11.5, 19.0.2.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3"]}]}]}