CVE-2026-57658
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 · uneditedAdministrator Arbitrary File Upload in TemplateSpare <= 4.2.0 versions.
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 confidenceTemplateSpare versions 4.2.0 and below contain an arbitrary file upload vulnerability that allows authenticated administrators to upload malicious files to the server, potentially leading to remote code execution.
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
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/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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Confirm TemplateSpare installationSearch for TemplateSpare files or check application directories for TemplateSpare components. Look for template files, configuration files, or application binaries bearing the TemplateSpare name.Affected if TemplateSpare is found installed in the environment
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Identify installed versionLocate version information in application metadata files, README files, configuration files, or the application itself. Compare the version number to the affected range of 4.2.0 and below.Affected if The installed version is 4.2.0 or any version below 4.2.0
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Verify administrative interface accessibilityDetermine if the administrator panel or admin dashboard is accessible via network. Check for exposed admin login endpoints or unauthenticated access to admin functions.Affected if Administrative interface is accessible without additional network restrictions
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Confirm file upload functionality existsLocate file upload endpoints within the application. Check for upload forms, API endpoints, or modules that handle file uploads, particularly in admin-accessible areas.Affected if File upload functionality is present in the application
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Inspect for suspicious uploaded filesReview web server directories, particularly upload folders, for unfamiliar or potentially malicious files such as PHP scripts, executables, or web shells with unexpected extensions.Affected if Unexpected or suspicious files are found in upload directories
You are affected if TemplateSpare version 4.2.0 or below is installed and the administrative interface with file upload capability is accessible.
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 dataRestrict administrative access to trusted users and implement strict file type validation, extension checking, and content-type verification on all upload endpoints.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,536.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57658 — 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-2026-57658 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data