Medium
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Type: advisorySources: OSV
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-3093
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 13:46 UTC · Revision 1
Source evidence
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
core-osv · Original sourcePublished 29 Jul 2026, 19:02 UTC
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.
osv:CVE-2026-3093
Complete source record
{
"id": "aec4c4b2c704ad57e9b4e33471313ab63aeff411426e2bf16041416784f9bcc2",
"url": "https://osv.dev/vulnerability/CVE-2026-3093",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab",
"summary": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.",
"evidence": "osv:CVE-2026-3093",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-3093",
"aliases": [
"BIT-gitlab-2026-3093",
"CVE-2026-3093"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://gitlab.com/gitlab-org/gitlab",
"type": "GIT",
"events": [
{
"introduced": "0034acfc891b0cbc2ecc4aa4c5ca0d1f89e3c32f"
},
{
"fixed": "e5e2c82b8e3d4db7b86f404c40483e32e3d0d0d8"
},
{
"introduced": "67581074a0aab1f53cdafe7eead5f5d07f3afec8"
},
{
"fixed": "f7e0d7bb4fa4f3f2f004b6bfa501f950285d87df"
},
{
"introduced": "68485a1eb627c9a992f266263157327649822db3"
},
{
"last_affected": "68485a1eb627c9a992f266263157327649822db3"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
"range": [
{
"introduced": "14.0.0"
},
{
"fixed": "19.0.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "14.0.0"
},
{
"fixed": "19.0.5"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
"range": [
{
"introduced": "19.1.0"
},
{
"fixed": "19.1.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "19.1.0"
},
{
"fixed": "19.1.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gitlab:gitlab:19.2.0:*:*:*:community:*:*:*",
"range": [
{
"introduced": "19.2.0"
},
{
"last_affected": "19.2.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gitlab:gitlab:19.2.0:*:*:*:enterprise:*:*:*",
"range": [
{
"introduced": "19.2.0"
},
{
"last_affected": "19.2.0"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"19.2.0",
"v19.1.0-ee",
"v19.2.0-ee"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3093.json"
}
}
],
"modified": "2026-10-30T10:30:17.582020189Z",
"provider": "osv",
"references": [
"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/",
"https://gitlab.com/gitlab-org/gitlab/-/work_items/591274",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3093.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-3093",
"https://hackerone.com/reports/3539833"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "GitLab",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "14.0"
},
{
"fixed": "19.0.5"
},
{
"introduced": "19.1"
},
{
"fixed": "19.1.3"
},
{
"introduced": "19.2"
},
{
"fixed": "19.2.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
},
{
"extracted_events": [
{
"range": [
{
"introduced": "14.0"
},
{
"fixed": "19.0.5"
},
{
"introduced": "19.1"
},
{
"fixed": "19.1.3"
},
{
"introduced": "19.2"
},
{
"fixed": "19.2.1"
}
],
"source": "DESCRIPTION"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3093.json"
}
},
"related_cves": [
{
"value": "CVE-2026-3093",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519515,
"published_at": "2026-07-29T19:02:11.038+00:00"
}