CVE-2026-91941Network attack vectorHinoki check available

Service interruption via unbounded PDF processing

Published Sep 15, 2026 · Updated Sep 15, 2026

Uncontrolled resource consumption in Crawl4AI before 0.9.3 allows attackers to interrupt shared workers through crafted PDF crawls. PDFContentScrapingStrategy streams remote PDFs to temporary files without a byte cap and parses them without a page limit, consuming disk, CPU, and bandwidth. Network reachability normally requires an authenticated Docker API client, while library exposure requires processing a PDF from an untrusted source.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled resource consumption in Crawl4AI before 0.9.3 allows attackers to interrupt shared workers through crafted PDF crawls. PDFContentScrapingStrategy streams remote PDFs to temporary files without a byte cap and parses them without a page limit, consuming disk, CPU, and bandwidth. Network reachability normally requires an authenticated Docker API client, while library exposure requires processing a PDF from an untrusted source.

The record

CVE
CVE-2026-91941
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Crawl4AI
Product
Crawl4AI
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Crawl4AI · Crawl4AIversion=0 <0.9.3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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