Security readout for executives and security teams
Plain-English summary
CVE-2026-26217 lets unauthenticated attackers make vulnerable Crawl4AI Docker API deployments read local server files. The main business risk is exposure of credentials, API keys, configuration, and internal structure, not direct system takeover from the cited evidence.
Executive priority
Treat this as urgent for any externally reachable Crawl4AI Docker API. Prioritize upgrade and exposure reduction, then assess whether credentials or configuration data may have been read.
Technical view
Crawl4AI versions before 0.8.0 allow file:// URLs through Docker API endpoints including /execute_js, /screenshot, /pdf, and /html. This creates local file inclusion with network access, no privileges, and no user interaction required. CVSS v4.0 is 9.2.
Likely exposure
Exposure is most likely where Crawl4AI Docker API is deployed below version 0.8.0 and reachable by untrusted networks or the internet. Systems storing secrets in environment variables or local config files face higher impact.
Exploitation context
The bundle does not show CISA KEV listing or confirmed active exploitation. Public advisories describe a remotely reachable unauthenticated file-read condition, so exploitation is plausible where vulnerable endpoints are exposed.
Researcher notes
The record identifies CWE-22 and confidentiality impact across vulnerable and subsequent systems. Evidence supports arbitrary local file read, including sensitive OS files and /proc/self/environ. It does not support integrity impact, availability impact, or active exploitation claims.
Mitigation direction
- Upgrade Crawl4AI Docker API deployments to version 0.8.0 or later.
- Restrict Docker API access to trusted networks until upgraded.
- Review vendor advisory and release notes for exact remediation guidance.
- Rotate secrets if vulnerable endpoints were exposed to untrusted users.
- Avoid storing high-value secrets in readable local files or process environments.
Validation and detection
- Inventory Crawl4AI Docker API deployments and confirm running versions.
- Identify exposure of /execute_js, /screenshot, /pdf, and /html endpoints.
- Review access logs for file:// URL requests to affected endpoints.
- Check whether local config files or environment secrets may have been exposed.
- Confirm patched deployments reject local file URL handling.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-26217 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N3.94VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.2CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-vx9w-5cx4-9796CVE reference, VulnCheck · vendor-advisory
- https://github.com/unclecode/crawl4ai/blob/main/docs/blog/release-v0.8.0.mdCVE reference, VulnCheck · release-notes
- https://www.vulncheck.com/advisories/crawl4ai-docker-api-local-file-inclusion-via-file-url-handlingCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.