Event Monitor Cyber
EM-20261109-95VR VulnerabilityCritical severity

Critical fastapi-code-generator Vulnerability (CVE-2026-63469)

CVE-2026-63469

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Status
Developing

Since : signals keep joining.

First Signal
Nov 03 20:18 UTCC6 NVD CVE API 2.0
Page Born
Nov 09 19:46 UTCsecond source joined
Last Signal
Nov 09 19:46 UTC5 hours before snapshot
Sources
30 official · 3 research, news or crowd
Open For
6 daysso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 03 20:18 UTC
    C6 NVD published
  2. Scored: reached
    Nov 03 20:18 UTC
    CVSS 9.3 · EPSS 0.3%
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: not yet
    Not yet
    None in sources yet
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

Nov 4Nov 5Nov 6Nov 7Nov 8Nov 9BornC6 NVD CVE API 2.0C29 CIRCL Vulnerability-LookupC26 GitHub Advisory Database

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. GHSA-6xmv-cjr5-w3q8 / CVE-2026-63469: fastapi-code-generator: Import-time RCE via response status-code key -> unescaped @app.get(..., responses={...}) dict (opens source in a new tab) pip:fastapi-code-generator Crit severityDatabaseC26 GitHub Advisory Database
  2. GHSA-6xmv-cjr5-w3q8 / CVE-2026-63469 (opens source in a new tab) fastapi-code-generator: Import-time RCE via response status-code key -> unescaped @app.get(..., responses={...}) dict Med severityDatabaseC29 CIRCL Vulnerability-Lookup
  3. CVE-2026-63469 (CVSS 9.3) (opens source in a new tab) fastapi-code-generator creates FastAPI applications from OpenAPI files. Prior to 0.8.1, the generator inserts an additional response status-code key into the generated responses={...} route-decorator dictionary as a… Crit severityDatabaseC6 NVD CVE API 2.0