CVE-2026-5126
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 · uneditedA flaw has been found in SourceCodester RSS Feed Parser 1.0. Affected by this issue is the function file_get_contents. This manipulation causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been published and may be used.
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 confidenceSourceCodester RSS Feed Parser 1.0 contains a Server-Side Request Forgery (SSRF) vulnerability in the file_get_contents function. An attacker can manipulate the input to make the server perform unauthorized requests to internal or external resources, potentially accessing sensitive internal services or exfiltrating data.
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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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 application identityIdentify if the deployed application is SourceCodester RSS Feed Parser version 1.0. Check application files, headers, or any version documentation.Affected if The application is SourceCodester RSS Feed Parser version 1.0
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Locate file_get_contents usageSearch the application source code for instances of file_get_contents function, particularly those used in RSS feed parsing logic.Affected if file_get_contents is used in the codebase without proper validation
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Identify URL input handlingExamine how user-supplied URLs are passed to the file_get_contents function. Look for parameters that accept feed URLs and trace them to the file_get_contents call.Affected if User-provided URL input flows directly to file_get_contents without sanitization
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Check for input validationReview the code between user input and file_get_contents to determine if an allowlist or validation exists for the URL parameter.Affected if No allowlist or strict validation is performed on the URL before passing to file_get_contents
You are affected if you are running SourceCodester RSS Feed Parser 1.0 and the application accepts user-supplied URLs that are passed to file_get_contents without strict allowlist validation.
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 strict input validation with an allowlist of permitted URLs/domains before passing data to file_get_contents. Consider using cURL with restricted follow redirects and timeout limits, or replace file_get_contents with safer alternatives that prevent arbitrary URL fetching.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-5126 — 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-2026-5126 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
- No spam, self-promotion, credentials, or personal data