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High

phpseclib Infinite Loop vulnerability

  • Disclosed: 03.03.2023
  • Updated: 11.10.2026 10:22

Math/PrimeField.php in phpseclib has an infinite loop with composite primefields. This vulnerability was introduced in version 3.0.0, and has been patched in 3.0.19. The CVE for this issue originally identified the the vulnerable version as 2.x, however, the vulnerable functionality was not introduced until version 3.

Affected software

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PlatformPackageVulnerable versionsFixed in
Composer package phpseclib/phpseclib >= 3.0.0, < 3.0.19 3.0.19

References

CVSS score 7.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-835
Platform
Composer
Package
phpseclib/phpseclib
Disclosed
03.03.2023
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-hm7p-r324-hhf3 - CC BY 4.0

Vulnerability history: phpseclib/phpseclib

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (11) in the archive
Total entries
11
First → latest
04.2021 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 8
  • Medium 2
  • Low 1

Disclosures per year

Severity:
  1. Phpseclib needs guardrails on large binaryfield integers
    High · 7.5 CVE-2023-49316 >= 3.0.0, < 3.0.34 3.0.34
  2. phpseclib guardrails needed on OID length
    High · 7.5 CVE-2024-27355 >= 2.0.0, < 2.0.47, >= 3.0.0, < 3.0.36, >= 0.1.1, < 1.0.23 2.0.47, 3.0.36, 1.0.23
  3. phpseclib: guardrails needed on isPrime and randomPrime
    High · 7.5 CVE-2024-27354 >= 0.1.1, < 1.0.23, >= 2.0.0, < 2.0.47, >= 3.0.0, < 3.0.36 1.0.23, 2.0.47, 3.0.36
  4. phpseclib has a CVE-2024-27355 mitigation bypass — OID amplification DoS in ASN1::decodeOID()
    High · 7.5 CVE-2026-44167 >= 0.1.1, < 1.0.29, >= 2.0.0, < 2.0.54, >= 3.0.0, < 3.0.52 1.0.29, 2.0.54, 3.0.52
  5. phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack
    High CVE-2026-32935 >= 3.0.0, < 3.0.50, >= 2.0.0, < 2.0.52, >= 0.1.1, < 1.0.27 3.0.50, 2.0.52, 1.0.27
  6. Name confusion in x509 Subject Alternative Name fields
    High · 7.5 CVE-2023-52892 < 1.0.22, >= 2.0.0, < 2.0.46, >= 3.0.0, < 3.0.33 1.0.22, 2.0.46, 3.0.33
  7. phpseclib Infinite Loop vulnerability this entry
    High · 7.5 CVE-2023-27560 >= 3.0.0, < 3.0.19 3.0.19
  8. Improper Certificate Validation in phpseclib
    High · 7.5 CVE-2021-30130 >= 3.0.0, < 3.0.7, < 2.0.31 3.0.7, 2.0.31

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