# CVE-2026-1660: CVE-2026-1660

Status: published. Published: 2026-04-22. Updated: 2026-11-11.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.3 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to cause denial of service when importing issues due to improper input validation.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- gitlab / gitlab: ≥ 12.3.0; < 18.9.6 (affected, custom). Source: NVD
- gitlab / gitlab: ≥ 18.10.0; < 18.10.4 (affected, custom). Source: NVD
- gitlab / gitlab: 18.11.0 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
            "versionEndExcluding": "18.9.6",
            "versionStartIncluding": "12.3.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
            "versionEndExcluding": "18.9.6",
            "versionStartIncluding": "12.3.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
            "versionEndExcluding": "18.10.4",
            "versionStartIncluding": "18.10.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
            "versionEndExcluding": "18.10.4",
            "versionStartIncluding": "18.10.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:community:*:*:*",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:enterprise:*:*:*",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: NVD: cve@gitlab.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation poc; automatable no; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-770

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/ (cve@gitlab.com; Release Notes, Vendor Advisory)

- https://gitlab.com/gitlab-org/gitlab/-/work_items/588200 (cve@gitlab.com; Broken Link)

- https://hackerone.com/reports/3518743 (cve@gitlab.com; Permissions Required)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1660; retrieved 2026-11-12; source updated 2026-11-11

Revision: 2c3cf4128cb6816c53bff8302b0ee98eda87f3b181244d20edd02902d04c4c0f

Canonical: https://y2.dev/cve/CVE-2026-1660

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.