Unauthenticated Disclosure of Scraping Credentials and Bypass Configuration via RansomLook API
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
RansomLook exposed sensitive operator-side scraping configuration through multiple unauthenticated API responses. Location records associated with ransomware groups and markets were returned largely verbatim to unauthenticated callers whenever the location itself was not marked as private. These records could contain internal fields such as header, which may include authentication headers, session cookies, or other credentials used to access monitored websites; init_script, which may contain logic used to bypass CAPTCHA, anti-bot protections, or paywalls; and browser, which discloses details about the scraping environment. An unauthenticated remote attacker could query the affected API endpoints and obtain these values. Leaked authentication material could potentially be replayed against the monitored service, while disclosure of scraping and bypass logic could allow site operators or other attackers to identify and defeat RansomLook's collection mechanisms. The patch introduces an explicit allowlist of fields permitted in public location records and strips all operator-side fields before returning data to unauthenticated users. The accompanying change from <string:postname> to <path:postname> appears to be a functional correction allowing legitimate post titles containing / and does not, based on this patch alone, represent the security issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ransomlook | ransomlook | up to 2.0.0 | — | No fix listed | CNA |
- ransomlook Vendorransomlook Affected up to 2.0.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-78386
- 2026-10-03 Alias added: GHSA-6q5p-jgh6-cxqm
References
More ransomlook vulnerabilities
- TI-2026-54504 RansomLook Missing Authorization Allows Disclosure of Private Group and Ransom Note Data CVSS 4.0CRITICAL 9.2
- TI-2026-54503 RansomLook Unauthenticated Database Export Exposes Private Data CVSS 4.0CRITICAL 9.2
- TI-2026-54619 RansomLook Login Endpoint Allows Timing-Based Username Enumeration and Unthrottled Authentication Attempts CVSS 4.0HIGH 8.8
- TI-2026-54502 Missing Authentication Allows Unauthorized Creation of Crypto Groups in RansomLook CVSS 4.0HIGH 8.8
- TI-2026-54517 Stored Cross-Site Scripting via Untrusted Cryptocurrency Address Rendering in RansomLook CVSS 4.0HIGH 8.8
- TI-2026-54622 RansomLook API Key Disclosure Through /admin/apikeys HTML Source CVSS 4.0CRITICAL 9.4
Sources
- CVE-2026-78386 · CVE Program
- CVE-2026-78386 · NVD
- FIRST EPSS
- GHSA-6q5p-jgh6-cxqm · GitHub Advisory Database · CC BY 4.0
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