How severe is CVE-2023-1894?

CVE-2023-1894 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2023-1894 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1894?

CVE-2023-1894 primarily affects Puppet Puppet Enterprise. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-1894?

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

When was CVE-2023-1894 published?

CVE-2023-1894 was published on 2023-05-04 and last updated on 2026-06-17.

CVE-2023-1894

CVE-2023-1894 is a medium-severity vulnerability in Puppet Puppet Enterprise with a CVSS 3.x base score of 5.3. 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-1333.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Puppet Puppet Enterprise
Published: 2023-05-04
Last modified: 2026-06-17

Description

A Regular Expression Denial of Service (ReDoS) issue was discovered in Puppet Server 7.9.2 certificate validation. An issue related to specifically crafted certificate names significantly slowed down server operations.

Frequently asked questions

What is CVE-2023-1894?: A Regular Expression Denial of Service (ReDoS) issue was discovered in Puppet Server 7.9.2 certificate validation. An issue related to specifically crafted certificate names significantly slowed down server operations.
How severe is CVE-2023-1894?: CVE-2023-1894 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2023-1894 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1894?: CVE-2023-1894 primarily affects Puppet Puppet Enterprise. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-1894?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-1894 published?: CVE-2023-1894 was published on 2023-05-04 and last updated on 2026-06-17.

References

https://www.puppet.com/security/cve/cve-2023-1894-puppet-server-redos

Affected products (3)

cpe:2.3:a:puppet:puppet_enterprise:2021.7.1:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet_enterprise:2023.0:*:*:*:*:*:*:*
cpe:2.3:a:puppet:puppet_server:7.9.2:*:*:*:*:*:*:*

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