How severe is CVE-2023-40626?

CVE-2023-40626 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-40626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40626?

CVE-2023-40626 primarily affects Joomla Joomla!. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40626?

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.

When was CVE-2023-40626 published?

CVE-2023-40626 was published on 2023-11-29 and last updated on 2026-06-17.

CVE-2023-40626

CVE-2023-40626 is a high-severity vulnerability in Joomla Joomla! with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Joomla Joomla!
Published: 2023-11-29
Last modified: 2026-06-17

Description

The language file parsing process could be manipulated to expose environment variables. Environment variables might contain sensible information.

Frequently asked questions

What is CVE-2023-40626?: The language file parsing process could be manipulated to expose environment variables. Environment variables might contain sensible information.
How severe is CVE-2023-40626?: CVE-2023-40626 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-40626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40626?: CVE-2023-40626 primarily affects Joomla Joomla!. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40626?: 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.
When was CVE-2023-40626 published?: CVE-2023-40626 was published on 2023-11-29 and last updated on 2026-06-17.

References

https://developer.joomla.org/security-centre/919-20231101-core-exposure-of-environment-variables.html

Affected products (2)

cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:5.0.0:*:*:*:*:*:*:*

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