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Fencer Vulns
critical 9.1

CVE-2026-56260 json

Crawl4AI - Arbitrary File Write via output_path Parameter

published 2026-06-16 4 mo ago modified 2026-11-08 27 h ago also CVE-2026-56261 , CVE-2026-56262 , CVE-2026-56263 , CVE-2026-56264 , CVE-2026-56265 , CVE-2026-56266 , EUVD-2026-43227 , GHSA-365w-hqf6-vxfg , GHSA-53rg-46cm-4g2v , GHSA-8qrg-7j2f-rf2h , GHSA-f23g-2f38-gg94 , GHSA-g2pv-76hm-j4x9 , GHSA-r9hw-78q5-478g , GHSA-xrfj-6m49-wfmm , PYSEC-2026-229 , PYSEC-2026-230 , PYSEC-2026-239 , PYSEC-2026-3443 , PYSEC-2026-3449 , PYSEC-2026-596 , PYSEC-2026-798

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

Crawl4AI before 0.8.7 contains an arbitrary file write vulnerability in the Docker API server's /screenshot and /pdf endpoints. The output_path parameter accepts arbitrary filesystem paths without validation, allowing an attacker to supply absolute or path-traversal values to write to any location writable by the application's user, overwriting server files and causing denial of service.

Patch / fix

  • pypi crawl4ai 0.8.7
  • Crawl4AI Crawl4AI 0.8.7

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
OSV 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi crawl4ai
<0.8.7
0.8.7

Affected products

  • Crawl4AI Crawl4AI

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-798 Use of Hard-coded Credentials
  • CWE-918 Server-Side Request Forgery
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.