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phpseclib

5 known vulnerabilities.

phpseclib at a glance

Last 12 months
5
Critical · all time
0
Exploited · all time
0
Public exploit · all time
0
New vulnerabilities per month · last 12 months
0 1 1 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 1 vulnerability Mar April 2026: 1 vulnerability May 2026: 1 vulnerability June 2026: 1 vulnerability Jun July 2026: 0 vulnerabilities August 2026: 0 vulnerabilities September 2026: 1 vulnerability Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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Products

5 results · Feed

  • Medium 6.3

    phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery

    phpseclib is a PHP secure communications library. Prior to 3.0.57 and 4.0.1, pure-PHP X25519 scalar multiplication in phpseclib/Math/PrimeField/Integer.php performs data-dependent conditional modular reductions in add() and subtract(). During the Montgomery l…

  • Medium 5.8

    phpseclib: X.509 certificate validation sends attacker-controlled outbound requests (server-side request forgery) via Authority Information Access

    phpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certificate with phpseclib, X509::validateSignature() reads a URL out of that certificate's Authority Information A…

  • High 7.5

    phpseclib: CVE-2024-27355 mitigation bypass — OID amplification DoS in ASN1::decodeOID()

    phpseclib is a PHP secure communications library. Prior to 1.0.29, 2.0.54, and 3.0.52, anyone loading untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc). This is a bypass of CVE-2024-27355. This vulnerability is fixed in 1.0.2…

  • Low 3.7

    phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()

    phpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-le…

  • High 8.2

    phpseclib's AES-CBC unpadding susceptible to padding oracle timing attack

    phpseclib is a PHP secure communications library. Projects using versions 0.1.1 through 1.0.26, 2.0.0 through 2.0.51, and 3.0.0 through 3.0.49 are vulnerable to a to padding oracle timing attack when using AES in CBC mode. This issue has been fixed in version…