CVE-2026-11345
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 · uneditedAn Improper Authentication vulnerability in the /api/Cdn/GetFile endpoint of linqi allows unauthenticated, remote attackers to bypass file access controls. The ValidateAnonFileAccess function incorrectly grants access if an 'AnonFile' query parameter containing exactly 256 characters is provided. While this flaw allows bypassing the intended authorization check, the actual security impact is negligible; the exposed resources are strictly limited to minified JavaScript and CSS files that contain no sensitive data and are already publicly accessible via a standard CDN.
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 · high confidenceThe ValidateAnonFileAccess function in linqi's /api/Cdn/GetFile endpoint contains a length-checking flaw where it incorrectly grants access when the AnonFile query parameter is exactly 256 characters, allowing unauthenticated attackers to bypass file access controls. While this bypasses intended authorization, the exposed resources are limited to minified JavaScript and CSS files already publicly accessible via CDN, limiting actual security impact.
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
- Authentication
- X
- User interaction
- None
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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
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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Confirm linqi installationIdentify if the linqi web application is running in your environment by checking for the product name in installed software, web server responses, or application logsAffected if linqi is present and running
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Check for CDN endpoint exposureProbe your environment for the /api/Cdn/GetFile endpoint by sending a GET request to your linqi instanceAffected if The endpoint responds (even with an error) indicating it exists
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Test length-bypass conditionSend a request to /api/Cdn/GetFile with an AnonFile query parameter set to exactly 256 random characters, without any authentication tokensAffected if The request succeeds and returns file content instead of an authentication error
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Verify accessible file typesIf step 3 succeeds, examine the returned file content to confirm it contains minified JavaScript or CSSAffected if Minified JS/CSS files are served without authentication
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Confirm public CDN availabilityCheck whether the same files are accessible through your configured CDN public endpointsAffected if The same files are already publicly accessible via CDN (indicating limited impact)
You are affected if the linqi /api/Cdn/GetFile endpoint grants access when the AnonFile parameter is exactly 256 characters long, allowing unauthenticated retrieval of files that should require authorization.
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 dataFix the ValidateAnonFileAccess function to correctly validate the AnonFile parameter length and ensure proper authentication enforcement regardless of parameter length.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-11345 — 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-2026-11345 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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