CVE WatchJul 23, 2026

CVE-2026-44895

GitLab MCP Server lets an AI agent talk directly to GitLab. Prior to 0.6.0, the HTTP transport in src/transport.ts ships with no authenticat

CVSS

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No CVSS

EPSS

0.4%

p33

KEV

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Exploit Today

0-100

Published: May 26, 2026 · Last modified: Jul 23, 2026 · CWE-306 · CWE-942

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-242026-09-21

Technical description

GitLab MCP Server lets an AI agent talk directly to GitLab. Prior to 0.6.0, the HTTP transport in src/transport.ts ships with no authentication layer at all and a wildcard Access-Control-Allow-Origin: * on every response. The structural defect is that the SSE server stands up a stateful, mutation-capable RPC endpoint that is backed by the operator's GITLAB_PERSONAL_ACCESS_TOKEN without any inbound credential check, then advertises itself to every cross-origin browser context via the wildcard CORS header. The httpServer.listen(port) call at line 97 also passes no host argument, so the bind defaults to 0.0.0.0 and exposes the auth-less surface on every interface. This vulnerability is fixed in 0.6.0.

Official references

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