Is CVE-2026-57940 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57940 being exploited in the wild.

How severe is CVE-2026-57940?

Informational severity, with a CVSS score of 2.1, published 26 June 2026.

Is there a fix for CVE-2026-57940?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-57940 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-57940?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57940: danpros HTMLy SSRF in RSS feed import functionality

CVE-2026-57940 · Severity: info · CVSS 2.1 · Published 2026-06-26

HTMLy, an open-source blogging platform, contains a security flaw in its RSS feed import tool. An authorized administrator can force the server to make unintended network requests to internal systems or external websites. This could be used to scan internal networks, access sensitive cloud metadata, or read local system files, potentially leading to further compromise of the hosting environment.

Quick answers

Is CVE-2026-57940 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57940 being exploited in the wild.
How severe is CVE-2026-57940?: Informational severity, with a CVSS score of 2.1, published 26 June 2026.
Which products and versions are affected?: danpros HTMLy 3.1.1.
Is there a fix for CVE-2026-57940?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-57940 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-57940?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Server-Side Request Forgery (SSRF) exists in HTMLy 3.1.1 within the RSS feed import functionality. The 'get_feed()' function in 'system/admin/admin.php' accepts a user-provided '$feed_url' and passes it directly to PHP's 'file_get_contents()' without validation or sanitization. An authenticated attacker with administrative privileges can provide malicious URLs using various schemes, such as 'file://' to read local files (e.g., /etc/passwd) or 'http://' to target internal network services and cloud metadata endpoints (e.g., 169.254.169.254). The vulnerability is reachable via the 'Tools -> Import RSS' administrative interface.

Affected products

danpros HTMLy 3.1.1

Timeline

2026-06-26: advisory: CVE-2026-57940 published by MITRE/NVD

References

https://github.com/danpros/htmly/blob/c8b7ed9af39a266b256759becf26dba6a59e11e6/system/admin/admin.php

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