In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.
Priority LOW 34CWE-834Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.
Why it matters now
EPSS 0.00783 56th percentileScored 2026-11-07
Fix Fixed phpseclib/phpseclib (Packagist): 3.0.34
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | phpseclib/phpseclib (Packagist) | 3.0.0 to before 3.0.34 | 3.0.34 | Patch available | GHSA-2f25-pfq3-c7h8 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- phpseclib/phpseclib (Packagist) Vendor— Affected 3.0.0 to before 3.0.34 Fixed in 3.0.34 Patch available GHSA-2f25-pfq3-c7h8
Remediation
- Fix · GHSA-2f25-pfq3-c7h8 phpseclib/phpseclib (Packagist) Fixed in 3.0.34 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-49316
- 2026-10-03 Alias added: GHSA-2f25-pfq3-c7h8
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-2023-29213 In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in… CVSS 3.1HIGH 7.5
- 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
Sources
- CVE-2023-49316 · CVE Program
- CVE-2023-49316 · NVD
- FIRST EPSS
- GHSA-2f25-pfq3-c7h8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences