CVE-2026-1090

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Source
https://cve.org/CVERecord?id=CVE-2026-1090
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1090.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-1090
Aliases
Downstream
Published
2026-03-11T16:05:05Z
Modified
2026-08-27T11:30:54Z
Severity
  • 8.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N CVSS Calculator
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.

Database specific 
{
    "cna_assigner": "GitLab",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "10.6"
                },
                {
                    "fixed": "18.7.6"
                },
                {
                    "introduced": "18.8"
                },
                {
                    "fixed": "18.8.6"
                },
                {
                    "introduced": "18.9"
                },
                {
                    "fixed": "18.9.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "10.6"
                },
                {
                    "fixed": "18.7.6"
                },
                {
                    "introduced": "18.8"
                },
                {
                    "fixed": "18.8.6"
                },
                {
                    "introduced": "18.9"
                },
                {
                    "fixed": "18.9.2"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / gitlab.com/gitlab-org/gitlab

Affected ranges

Type
GIT
Repo
https://gitlab.com/gitlab-org/gitlab
Events
Introduced
3d59f5643aa87ca1fc506bf1ad37262d8ca6b4d6
Fixed
4ff507582a71b3fee0ef5a34e7ab583281391758
Introduced
1010a9b2b769993080ce8399fd25e77c54e1ad1c
Fixed
5831acc89ce4c662f751bb062d1df3bcf2b8cb4e
Introduced
20fe49b575fedd2b8cadc2c0640178879854aeb3
Fixed
fcb80522240b3ea1821ac6c2d52b00159bcda5a6
Database specific
Show details 
{
    "cpe": [
        "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
        "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "10.6.0"
        },
        {
            "fixed": "18.7.6"
        },
        {
            "introduced": "18.8.0"
        },
        {
            "fixed": "18.8.6"
        },
        {
            "introduced": "18.9.0"
        },
        {
            "fixed": "18.9.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

v18.*
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"