How severe is CVE-2026-85586?

CVE-2026-85586 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2026-85586 being actively exploited?

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

How do I fix CVE-2026-85586?

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

When was CVE-2026-85586 published?

CVE-2026-85586 was published on 2026-09-04 and last updated on 2026-09-10.

CVE-2026-85586

CVE-2026-85586 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-799.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-799
Published: 2026-09-04
Last modified: 2026-09-10

Description

phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.

Frequently asked questions

What is CVE-2026-85586?: phpMyFAQ versions before 4.1.8 fail to validate CAPTCHA when the store parameter is set to 'now' in question submission requests. Unauthenticated attackers can bypass CAPTCHA protection and submit unlimited questions directly, causing database pollution and triggering outgoing mail notifications.
How severe is CVE-2026-85586?: CVE-2026-85586 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2026-85586 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-85586?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-85586 published?: CVE-2026-85586 was published on 2026-09-04 and last updated on 2026-09-10.

References

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