CVE Explorer

CVE-2026-48529

GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from different users share this singleton and their lockdown-related GraphQL queries are executed using the first user's credentials. The singleton is never updated to reflect later users' tokens. This vulnerability

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3bd00323229d05afce21e56eac5efd7f98086ce515657d7fe5cfc6628abc9778

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"github-mcp-server","vendor":"github","versions":[{"status":"affected","version":">= 0.22.0, < 1.1.2"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c8ca5bb24ef06074f2856e7cae6b30e00921f6e569294d67f191aa386e22d85b · sha256:f5a5b07169c025dd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:c8ca5bb24ef06074f2856e7cae6b30e00921f6e569294d67f191aa386e22d85b · sha256:f5a5b07169c025dd… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c8ca5bb24ef06074f2856e7cae6b30e00921f6e569294d67f191aa386e22d85b · sha256:f5a5b07169c025dd… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["exploit"],"url":"https://github.com/github/github-mcp-server/security/advisories/GHSA-pjp5-fpmr-3349"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c8ca5bb24ef06074f2856e7cae6b30e00921f6e569294d67f191aa386e22d85b · sha256:f5a5b07169c025dd… · /containers/adp/0/references/0

{"name":"https://github.com/github/github-mcp-server/security/advisories/GHSA-pjp5-fpmr-3349","tags":["x_refsource_CONFIRM"],"url":"https://github.com/github/github-mcp-server/security/advisories/GHSA-pjp5-fpmr-3349"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c8ca5bb24ef06074f2856e7cae6b30e00921f6e569294d67f191aa386e22d85b · sha256:f5a5b07169c025dd… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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