CVE-2026-26095
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 · uneditedIncorrect Permission Assignment for Critical Resource in Owl opds 2.2.0.4 allows File Manipulation via a crafted network request.
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 confidenceOwl opds version 2.2.0.4 contains an incorrect permission assignment vulnerability where critical system resources have improper access controls. This allows authenticated or unauthenticated attackers to manipulate files on the server through crafted network requests by exploiting the misconfigured permissions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2.2.0.4CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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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Verify OPDS Talon versionLocate and inspect the installed Owlcyberdefense Opds Talon version information, typically via the application itself, its installation directory, or system package manager.Affected if Installed version is exactly 2.2.0.4 (no other versions are listed as affected)
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Confirm OPDS web service is accessibleDetermine if the OPDS Talon web interface is reachable via network requests from external systems or untrusted networks.Affected if The OPDS service is exposed to unauthenticated or untrusted network access, allowing attackers to send crafted requests
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Review file system permissions on OPDS data directoriesInspect file system access controls on directories where OPDS stores content, configuration, or user data files.Affected if Critical files or directories are writable by the web server process user or have overly permissive access rights (e.g., world-writable or group-writable)
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Check OPDS configuration for permission settingsExamine OPDS configuration files for any access control, role-based permissions, or file operation settings.Affected if Permission settings are missing, misconfigured, or allow file operations without proper validation
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Audit file operation logs for unauthorized accessReview OPDS application logs for any file manipulation operations that occurred without proper authentication or authorization.Affected if Logs show file create, modify, or delete operations from unauthenticated sources or users lacking proper permissions
A user is affected if OPDS Talon version 2.2.0.4 is installed and the service is network-accessible with misconfigured file system permissions allowing unauthorized file manipulation.
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 dataReview and correct file system permission assignments on critical resources within the OPDS application. Implement proper access control checks and validate that file operations respect role-based or user-based permissions.
- Consultation3.0 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 $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-26095 — 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-2026-26095 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
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