{"id":"CVE-2026-1090","summary":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab","details":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.","aliases":["BIT-gitlab-2026-1090"],"modified":"2026-04-10T05:36:57.025191Z","published":"2026-03-11T16:05:05.863Z","database_specific":{"cwe_ids":["CWE-79"],"cna_assigner":"GitLab","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json"},"references":[{"type":"WEB","url":"https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/"},{"type":"WEB","url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/586478"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1090"},{"type":"REPORT","url":"https://hackerone.com/reports/3502450"},{"type":"PACKAGE","url":"git://git@gitlab.com:gitlab-org/gitlab.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"3d59f5643aa87ca1fc506bf1ad37262d8ca6b4d6"},{"fixed":"4ff507582a71b3fee0ef5a34e7ab583281391758"},{"introduced":"3d59f5643aa87ca1fc506bf1ad37262d8ca6b4d6"},{"fixed":"4ff507582a71b3fee0ef5a34e7ab583281391758"},{"introduced":"1010a9b2b769993080ce8399fd25e77c54e1ad1c"},{"fixed":"5831acc89ce4c662f751bb062d1df3bcf2b8cb4e"},{"introduced":"1010a9b2b769993080ce8399fd25e77c54e1ad1c"},{"fixed":"5831acc89ce4c662f751bb062d1df3bcf2b8cb4e"},{"introduced":"20fe49b575fedd2b8cadc2c0640178879854aeb3"},{"fixed":"fcb80522240b3ea1821ac6c2d52b00159bcda5a6"},{"introduced":"20fe49b575fedd2b8cadc2c0640178879854aeb3"},{"fixed":"fcb80522240b3ea1821ac6c2d52b00159bcda5a6"}],"database_specific":{"versions":[{"introduced":"10.6.0"},{"fixed":"18.7.6"},{"introduced":"10.6.0"},{"fixed":"18.7.6"},{"introduced":"18.8.0"},{"fixed":"18.8.6"},{"introduced":"18.8.0"},{"fixed":"18.8.6"},{"introduced":"18.9.0"},{"fixed":"18.9.2"},{"introduced":"18.9.0"},{"fixed":"18.9.2"}]}}],"versions":["v18.8.0-ee","v18.8.1-ee","v18.8.3-ee","v18.9.0-ee"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1090.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"}]}