In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in…
Priority MEDIUM 41CWE-436Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00376 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed phpseclib/phpseclib (Packagist): 1.0.22, 2.0.46, 3.0.33
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | phpseclib/phpseclib (Packagist) | before 1.0.22 | 1.0.22 | Patch available | GHSA-ff7q-6vwh-v9m4 |
| — | phpseclib/phpseclib (Packagist) | 2.0.0 to before 2.0.46 | 2.0.46 | Patch available | GHSA-ff7q-6vwh-v9m4 |
| — | phpseclib/phpseclib (Packagist) | 3.0.0 to before 3.0.33 | 3.0.33 | Patch available | GHSA-ff7q-6vwh-v9m4 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- phpseclib/phpseclib (Packagist) Vendor— Affected before 1.0.22 Fixed in 1.0.22 Patch available GHSA-ff7q-6vwh-v9m4
- phpseclib/phpseclib (Packagist) Vendor— Affected 2.0.0 to before 2.0.46 Fixed in 2.0.46 Patch available GHSA-ff7q-6vwh-v9m4
- phpseclib/phpseclib (Packagist) Vendor— Affected 3.0.0 to before 3.0.33 Fixed in 3.0.33 Patch available GHSA-ff7q-6vwh-v9m4
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:* | 1.0.0 to before 1.0.22; 2.0.0 to before 2.0.46; 3.0.0 to before 3.0.33 | Vulnerable | phpseclib |
- cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:* Versions 1.0.0 to before 1.0.22; 2.0.0 to before 2.0.46; 3.0.0 to before 3.0.33 Vulnerable ·phpseclib
Remediation
- Fix · GHSA-ff7q-6vwh-v9m4 phpseclib/phpseclib (Packagist) Fixed in 1.0.22 Advisory →
- Fix · GHSA-ff7q-6vwh-v9m4 phpseclib/phpseclib (Packagist) Fixed in 2.0.46 Advisory →
- Fix · GHSA-ff7q-6vwh-v9m4 phpseclib/phpseclib (Packagist) Fixed in 3.0.33 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-52892
- 2026-10-03 Alias added: GHSA-ff7q-6vwh-v9m4
References
More Phpseclib vulnerabilities
- TI-2026-40135 Server-side request forgery in phpseclib CVSS 3.1MEDIUM 5.8
- TI-2026-29008 phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals() CVSS 3.1LOW 3.7
- TI-2024-18192 An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before… CVSS 3.1HIGH 7.5
- TI-2024-18191 An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before… CVSS 3.1HIGH 7.5
- TI-2023-12272 Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields. CVSS 3.1HIGH 7.5
- TI-2026-25383 phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack CVSS 4.0HIGH 8.2
Sources
- CVE-2023-52892 · CVE Program
- CVE-2023-52892 · NVD
- FIRST EPSS
- GHSA-ff7q-6vwh-v9m4 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-52892 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences