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Vulnerability record · CVE-2023-52892 · published 27 June 2024

CVE-2023-52892: Phpseclib interpretation conflict vulnerability

Phpseclib · Phpseclib

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

7.5 CVSS 3.1 High EPSS 0.38% · top 71.1% CWE-436 · Interpretation conflict
7.5CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/phpseclib/phpseclib/commit/6cd6e8ceab9f2b55c8cd81d2192bf98cbeaf4627 Patch
https://github.com/phpseclib/phpseclib/issues/1943 ExploitIssue Tracking
https://github.com/phpseclib/phpseclib/releases/tag/3.0.33 Release Notes
https://github.com/x509-name-testing/name_testing_artifacts Not Applicable
https://github.com/phpseclib/phpseclib/commit/6cd6e8ceab9f2b55c8cd81d2192bf98cbeaf4627 Patch
https://github.com/phpseclib/phpseclib/issues/1943 ExploitIssue Tracking
https://github.com/phpseclib/phpseclib/releases/tag/3.0.33 Release Notes
https://github.com/x509-name-testing/name_testing_artifacts Not Applicable

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-52892), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.