CVE-2026-40383
CVE-2026-40383 is a critical-severity vulnerability in Joomla Joomla! with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
- CVSS v4: 7.5
- EPSS exploit prediction: 0% (38th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-31888
- Weakness: CWE-22
- Affected product: Joomla Joomla!
- Published:
- Last modified:
Description
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
Frequently asked questions
- What is CVE-2026-40383?
- An improper validation of user-supplied input leads to a local file inclusion vulnerability.
- How severe is CVE-2026-40383?
- CVE-2026-40383 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-40383 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-40383?
- CVE-2026-40383 affects Joomla Joomla!. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-40383?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-40383 have an EU (EUVD) identifier?
- Yes. CVE-2026-40383 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31888.
- When was CVE-2026-40383 published?
- CVE-2026-40383 was published on 2026-05-26 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
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