CVE-2026-63471

waiting for further signalsZero needs more public information before it can validate it.

GHSA-p2mm-64f6-gmpp ↗EUVD-2026-116147 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
pip fastapi-code-generator < 0.8.1
fixed in 0.8.1
ETK-2026-3992Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:pypi/fastapi-code-generator
1d 09h 11msince last run
11mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org publication
trigger signal (cve.org) +0hwaiting for further signals+146h30m
0
+2h
+4h
+6h
+8h
+10h

description

fastapi-code-generator versions before 0.8.1 improperly handle quote characters in OpenAPI route paths when generating Python route declarations. An attacker who can influence a processed OpenAPI specification may cause code to run with the privileges of a CI, build, or application process when the generated module is imported.

mitigation

Upgrade fastapi-code-generator to version 0.8.1 or later. Until upgrades are complete, process only trusted OpenAPI specifications and avoid importing generated applications from untrusted inputs.

fixed in 0.8.1

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.31%24th percentile
agent run time
11m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-03 19:18Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual, not validated: no deterministic check could cover this one, and no technique passed our review.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-11-03 19:18Z
    ghsa: trigger signal, started the run
  2. 2026-11-03 19:18Z

this entry in the feed

GET /api/v1/feed/CVE-2026-63471

{
  "etk_id": "ETK-2026-3992",
  "cve_id": "CVE-2026-63471",
  "display_id": "CVE-2026-63471",
  "ghsa_id": "GHSA-p2mm-64f6-gmpp",
  "euvd_id": "EUVD-2026-116147",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Code injection via OpenAPI paths in fastapi-code-generator",
  "summary": "fastapi-code-generator versions before 0.8.1 improperly handle quote characters in OpenAPI route paths when generating Python route declarations. An attacker who can influence a processed OpenAPI specification may cause code to run with the privileges of a CI, build, or application process when the generated module is imported.",
  "mitigation": "Upgrade fastapi-code-generator to version 0.8.1 or later. Until upgrades are complete, process only trusted OpenAPI specifications and avoid importing generated applications from untrusted inputs.",
  "vendor": "pip",
  "product": "fastapi-code-generator",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "< 0.8.1"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.8.1"
      ],
      "package_name": "fastapi-code-generator",
      "purl": "pkg:pypi/fastapi-code-generator"
    }
  ],
  "cwes": null,
  "cvss_score": 9.3,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0031,
  "epss_percentile": 0.2431,
  "epss_asof": "2026-11-09",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 11.466333666666667,
  "t0_at": "2026-11-03T19:18:44.111000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-03T19:18:44.111000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-03T19:18:44.111000+00:00",
      "url": "https://github.com/advisories/GHSA-p2mm-64f6-gmpp"
    }
  }
}

published 2026-11-09 21:37Z
last change 2026-11-11 02:25Z

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