What is CVE-2026-34974?

phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1.

How severe is CVE-2026-34974?

CVE-2026-34974 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-34974 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34974?

CVE-2026-34974 affects Phpmyfaq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34974?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34974 have an EU (EUVD) identifier?

Yes. CVE-2026-34974 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18332.

When was CVE-2026-34974 published?

CVE-2026-34974 was published on 2026-04-02 and last updated on 2026-06-17.

CVE-2026-34974

CVE-2026-34974 is a medium-severity vulnerability in Phpmyfaq with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18332
Weakness: CWE-79
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 regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG <a href> attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1.

Frequently asked questions

What is CVE-2026-34974?: phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG <a href> attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1.
How severe is CVE-2026-34974?: CVE-2026-34974 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-34974 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34974?: CVE-2026-34974 affects Phpmyfaq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34974?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34974 have an EU (EUVD) identifier?: Yes. CVE-2026-34974 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18332.
When was CVE-2026-34974 published?: CVE-2026-34974 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.

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