Security readout for executives and security teams
Plain-English summary
CVE-2026-56259 affects Crawl4AI before 0.8.8. An unauthenticated attacker could make the Docker API server send LLM requests to an attacker-controlled endpoint and expose secrets stored in environment variables, including LLM API keys and the JWT SECRET_KEY. This can lead to credential theft and possible authentication bypass.
Executive priority
Treat as urgent for internet-facing or shared Crawl4AI deployments. The main business risk is theft of AI provider credentials and server secrets, potentially causing unauthorized API usage, data exposure, and authentication bypass.
Technical view
The issue is CWE-200 information exposure in Crawl4AI’s Docker API server. Public advisories describe abuse of unauthenticated /md, /llm, and /llm/job endpoints using base_url redirection and api_token environment-variable resolution. The CVSS v4.0 score is 8.8, reflecting network access, low complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Highest risk is for Crawl4AI Docker API server instances running versions before 0.8.8, especially if reachable from untrusted networks. Systems with LLM provider keys, JWT SECRET_KEY, or other sensitive environment variables are materially exposed.
Exploitation context
The provided sources do not state active exploitation, and this CVE is not listed as KEV in the bundle. Exploitation is described as unauthenticated and network-based, with attacker influence over LLM request routing and environment variable token resolution.
Researcher notes
Sources identify the vulnerable behavior and affected range but do not provide evidence of active exploitation. Focus validation on exposed Docker API servers, version confirmation, environment-stored secrets, and anomalous use of LLM endpoints. Avoid assuming other Crawl4AI deployment modes are affected unless vendor guidance confirms it.
Mitigation direction
- Upgrade Crawl4AI to version 0.8.8 or later per vendor advisory.
- Restrict Crawl4AI Docker API server access to trusted networks only.
- Rotate LLM API keys and JWT SECRET_KEY if exposure is suspected.
- Review vendor and VulnCheck guidance for any updated hardening instructions.
Validation and detection
- Inventory Crawl4AI Docker API server deployments and confirm versions.
- Identify any instances running versions before 0.8.8.
- Check whether /md, /llm, or /llm/job were reachable by untrusted users.
- Review logs for suspicious LLM endpoint redirection or unusual token resolution activity.
- Determine which sensitive secrets were present in environment variables.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program 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-2026-56259 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
- High
- CVSS
- 8.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/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.
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:L/VA:N/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N3.94.2VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.8HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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.
Source materials
- CVE List V5 sourceCVE List V5
- GitHub Security Advisory (GHSA-f989-c77f-r2cq)CVE reference, VulnCheck · vendor-advisory
- VulnCheck Advisory: Crawl4AI - LLM Credential Exfiltration via base_url and Environment Variable ResolutionCVE 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.