CVE-2026-39641
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedCross-Site Request Forgery (CSRF) vulnerability in Skywarrior Blackfyre blackfyre allows Cross Site Request Forgery.This issue affects Blackfyre: from n/a through <= 2.5.4.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCross-Site Request Forgery (CSRF) vulnerability in Blackfyre allows attackers to trick authenticated users into submitting unintended requests to the application. The lack of proper CSRF tokens or anti-CSRF measures enables malicious actors to perform state-changing actions on behalf of victims.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Skywarrior Blackfyre versionCheck the application's version file, about page, or API endpoint that exposes version information. Common locations include version.json, /about, or the application header/footer.Affected if The installed version is 2.5.4 or lower
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Verify anti-CSRF token implementationInspect the application's HTML forms or API requests for state-changing operations (such as data modification, deletion, or configuration changes). Check if a unique token value is included in each request and validated on the server side.Affected if State-changing requests do not include anti-CSRF tokens or the server does not validate them
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Check Origin/Referer header validationExamine the server-side code or configuration to determine if incoming requests are validated against an allowed Origin or Referer header list before processing state-changing operations.Affected if The application does not validate Origin or Referer headers for state-changing requests
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Inspect session cookie SameSite attributeExamine the session cookie configuration by reviewing HTTP response headers (using browser dev tools, curl -I, or a network capture) to see if the SameSite attribute is set to 'Strict' or 'Lax'.Affected if Session cookies lack SameSite attribute or have it set to 'None' without Secure flag
A user is affected if their Skywarrior Blackfyre installation is version 2.5.4 or lower AND state-changing operations lack anti-CSRF protections (no tokens, no Origin/Referer validation, and no SameSite cookies).
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement anti-CSRF tokens on all state-changing operations (forms, API endpoints) and validate the Origin/Referer headers. Alternatively, enable SameSite cookies for session cookies to provide browser-level CSRF protection.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-39641 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-39641 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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