How severe is CVE-2026-34728?

CVE-2026-34728 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-34728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34728?

CVE-2026-34728 affects Phpmyfaq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34728?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34728 have an EU (EUVD) identifier?

Yes. CVE-2026-34728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18258.

When was CVE-2026-34728 published?

CVE-2026-34728 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-34728

CVE-2026-34728 is a high-severity vulnerability in Phpmyfaq with a CVSS 3.x base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.7)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18258
Weakness: CWE-22
Affected product: Phpmyfaq
Published: 2026-04-02
Last modified: 2026-06-17

Description

phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', ", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks. This issue has been patched in version 4.1.1.

Frequently asked questions

What is CVE-2026-34728?: phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the MediaBrowserController::index() method handles file deletion for the media browser. When the fileRemove action is triggered, the user-supplied name parameter is concatenated with the base upload directory path without any path traversal validation. The FILTER_SANITIZE_SPECIAL_CHARS filter only encodes HTML special characters (&, ', ", <, >) and characters with ASCII value < 32, and does not prevent directory traversal sequences like ../. Additionally, the endpoint does not validate CSRF tokens, making it exploitable via CSRF attacks. This issue has been patched in version 4.1.1.
How severe is CVE-2026-34728?: CVE-2026-34728 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-34728 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34728?: CVE-2026-34728 affects Phpmyfaq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34728?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34728 have an EU (EUVD) identifier?: Yes. CVE-2026-34728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18258.
When was CVE-2026-34728 published?: CVE-2026-34728 was published on 2026-04-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*

More vulnerabilities in Phpmyfaq

CVE-2023-5865 — Critical (CVSS 9.8): Insufficient Session Expiration in GitHub repository thorsten/phpmyfaq prior to 3.2.2.
CVE-2023-5227 — Critical (CVSS 9.8): Unrestricted Upload of File with Dangerous Type in GitHub repository thorsten/phpmyfaq prior to 3.1.8.
CVE-2023-4006 — Critical (CVSS 9.8): Improper Neutralization of Formula Elements in a CSV File in GitHub repository thorsten/phpmyfaq prior to 3.1.16.
CVE-2023-2429 — Critical (CVSS 9.8): Improper Access Control in GitHub repository thorsten/phpmyfaq prior to 3.1.13.
CVE-2023-0311 — Critical (CVSS 9.8): Improper Authentication in GitHub repository thorsten/phpmyfaq prior to 3.1.10.
CVE-2023-0307 — Critical (CVSS 9.8): Weak Password Requirements in GitHub repository thorsten/phpmyfaq prior to 3.1.10.

All CVEs affecting Phpmyfaq →

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