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CVE-2025-66389

GitHub Copilot 1.372.0 allows filesystem access outside of a workspace folder (without user approval) via a file-handler URI parameter to fetch_webpage. Therefore, exfiltration could occur if there is indirect prompt injection.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c18bc8058b21c697a0990800364a8aa696910452212260f51d3be30a30776987
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-552","description":"CWE-552 Files or Directories Accessible to External Parties","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-552","description":"CWE-552 Files or Directories Accessible to External Parties","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://blindcyber.com/2025/10/28/copilot-fun/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/references/2
{"url":"https://github.com/microsoft/vscode-copilot-chat/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/references/0
{"url":"https://github.com/microsoft/vscode/blob/03baef1008086ed4960042fa463e570072173bb5/src/vs/workbench/contrib/chat/electron-browser/tools/fetchPageTool.ts#L152"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5b5f3aba18ddba1a59c4d9b66f66167e73fb26f9066e6fd960d11de967c94b00 · sha256:54b42e36f3a24e28… · /containers/cna/references/1

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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