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CVE-2026-91941

Status: Awaiting AnalysisHigh (8.7)—

Crawl4AI before 0.9.3 contains an uncontrolled resource consumption vulnerability in PDFContentScrapingStrategy that allows untrusted clients to cause denial of service. Attackers can select the PDF scraping strategy in POST requests to download large remote PDFs without size or page limits, exhausting disk, CPU, and bandwidth on shared workers.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

AV:N/PR:N/UI:N permite explotación remota sin autenticación (T1190). VA:H en PDFContentScrapingStrategy causa consumo descontrolado de recursos CPU, disco y ancho de banda (T1499/DoS).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Kidocode — Crawl4aiAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-91941",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-91941",
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          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-09-20T00:28:11.204154Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    "cvssMetricV40": [
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "vulnIntegrityImpact": "NONE",
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          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "published": "2026-09-15T16:17:46.000",
  "references": [
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      "url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-v2rm-hvrj-2x9q",
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      "url": "https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-denial-of-service-via-pdfcontentscrapingstrategy",
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    }
  ],
  "lastModified": "2026-09-20T01:16:33.873",
  "sourceIdentifier": "disclosure@vulncheck.com"
}