@zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery
`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Starting in version 0.0.1 and prior to version 2.1.27, when the environment variable `ENABLE_DYNAMIC_API_URL=true` is set, the server reads the `X-GitLab-API-URL` HTTP request header and uses it as the base URL for all outbound GitLab API calls made within that request. The server validates that the value is a well-formed URL (`new URL(dynamicApiUrl)`) but applies no allowlist or hostname restriction. The server then attaches the victim's `Private-Token` to every outbound fetch that uses the redirected URL. Any caller who can reach the HTTP transport can set `X-GitLab-API-URL` to an attacker-controlled host. The next GitLab API call the server makes delivers the victim's token to that host. Version 2.1.27 contains a patch.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-61559
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:30 UTC · Revision 1
Source evidence
@zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery
core-osv · Original sourcePublished 15 Sept 2026, 20:58 UTC
`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Starting in version 0.0.1 and prior to version 2.1.27, when the environment variable `ENABLE_DYNAMIC_API_URL=true` is set, the server reads the `X-GitLab-API-URL` HTTP request header and uses it as the base URL for all outbound GitLab API calls made within that request. The server validates that the value is a well-formed URL (`new URL(dynamicApiUrl)`) but applies no allowlist or hostname restriction. The server then attaches the victim's `Private-Token` to every outbound fetch that uses the redirected URL. Any caller who can reach the HTTP transport can set `X-GitLab-API-URL` to an attacker-controlled host. The next GitLab API call the server makes delivers the victim's token to that host. Version 2.1.27 contains a patch.
osv:CVE-2026-61559
Complete source record
{
"id": "9496a4083f7df85a6fb971fbef72d44c853241ecf0f9b3770c0ef3af4fb404f3",
"url": "https://osv.dev/vulnerability/CVE-2026-61559",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "@zereight/mcp-gitlab Vulnerable to Server-Side Request Forgery",
"summary": "`@zereight/mcp-gitlab` is a Model Context Protocol server for GitLab. Starting in version 0.0.1 and prior to version 2.1.27, when the environment variable `ENABLE_DYNAMIC_API_URL=true` is set, the server reads the `X-GitLab-API-URL` HTTP request header and uses it as the base URL for all outbound GitLab API calls made within that request. The server validates that the value is a well-formed URL (`new URL(dynamicApiUrl)`) but applies no allowlist or hostname restriction. The server then attaches the victim's `Private-Token` to every outbound fetch that uses the redirected URL. Any caller who can reach the HTTP transport can set `X-GitLab-API-URL` to an attacker-controlled host. The next GitLab API call the server makes delivers the victim's token to that host. Version 2.1.27 contains a patch.",
"evidence": "osv:CVE-2026-61559",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-61559",
"aliases": [
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"GHSA-2h44-8472-frjj"
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"
}
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"affected": [
{
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"repo": "https://github.com/zereight/gitlab-mcp",
"type": "GIT",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61559.json"
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],
"modified": "2026-10-28T02:30:32.734692984Z",
"provider": "osv",
"references": [
"https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.27",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61559.json",
"https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-2h44-8472-frjj",
"https://nvd.nist.gov/vuln/detail/CVE-2026-61559",
"https://github.com/zereight/gitlab-mcp/commit/6ffb4cc70706fd05b1ab80901676bc2998b6db6d",
"https://github.com/zereight/gitlab-mcp/pull/625"
],
"provider_metadata": {
"cwe_ids": [
"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61559.json"
}
},
"related_cves": [
{
"value": "CVE-2026-61559",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 500032,
"published_at": "2026-09-15T20:58:41.639+00:00"
}