CVE-2026-44040

UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produce VNC authentication challenge bytes. In rfb/vncauth.c:119-129, the vncRandomBytes function seeds libc rand with time0 + getpid + rand and generates a 16-byte challenge. The combined seed space is...

CVE-2026-7830 UltraVNC MS-Logon II uses 64-bit Diffie-Hellman and seeded libc rand() enabling credential interception

UltraVNC through 1.8.2.2 uses inadequate cryptography in the MS-Logon II authentication scheme rfbUltraVNCMsLogonIIAuth. In rfb/dh.cpp the Diffie-Hellman key exchange is performed with parameters that fit in an unsigned 64-bit integer DHMAXBITS controls the prime size. A 64-bit DH key can be brok...

CVE-2026-44040 UltraVNC vncauth.c uses time-seeded libc rand() to generate VNC authentication challenge bytes

UltraVNC through 1.8.2.2 uses a cryptographically weak pseudo-random number generator to produce VNC authentication challenge bytes. In rfb/vncauth.c:119-129, the vncRandomBytes function seeds libc rand with time0 + getpid + rand and generates a 16-byte challenge. The combined seed space is...

CVE-2026-44040

UltraVNC

CVE-2026-5085

Solstice::Session versions through 1440 for Perl generates session ids insecurely. The generateSessionID method returns an MD5 digest seeded by the epoch time, a random hash reference, a call to the built-in rand function and the process id. The same method is used in the generateID method in...

CVE-2026-5085

Solstice::Session for Perl (versions through 1440) contains a vulnerability where it generates insecure and predictable session IDs . The _generateSessionID method produces an MD5 digest seeded by multiple predictable inputs: the epoch time (which may be guessable), a random hash reference with p...

PT-2026-32282

Solstice::Session versions through 1440 for Perl generates session ids insecurely. The generateSessionID method returns an MD5 digest seeded by the epoch time, a random hash reference, a call to the built-in rand function and the process id. The same method is used in the generateID method in...

CVE-2026-25726

Cloudreve is a self-hosted file management and sharing system. Prior to version 4.13.0, the application uses the weak pseudo-random number generator math/rand seeded with time.Now.UnixNano to generate critical security secrets, including the secretkey, and hashidsalt. These secrets are generated...

EUVD-2026-16939

HTTP::Session versions through 0.53 for Perl defaults to using insecurely generated session ids. HTTP::Session defaults to using HTTP::Session::ID::SHA1 to generate session ids using a SHA-1 hash seeded with the built-in rand function, the high resolution epoch time, and the PID. The PID will com...

CVE-2026-3256

The CVE-2026-3256 issue affects the HTTP::Session Perl module (versions through 0.53). The root cause is insecure session ID generation: HTTP::Session::ID::SHA1 creates IDs by hashing a seed composed of the built-in rand() value, high-resolution epoch time, and the process ID. The PID comes from ...

CVE-2025-40931 Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id

Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id. Apache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come fro...

CVE-2025-40931

Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id. Apache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come fro...

CVE-2026-3255

HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand function. The HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epo...

EUVD-2026-9063

HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand function. The HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epo...

CVE-2026-3255

HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand function. The HTTP::Session2 session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will come from a small set of numbers, and the epo...

CVE-2025-40932

Apache::SessionX versions through 2.01 for Perl create insecure session id. Apache::SessionX generates session ids insecurely. The default session id generator in Apache::SessionX::Generate::MD5 returns a MD5 hash seeded with the built-in rand function, the epoch time, and the PID. The PID will...

CVE-2025-15578 Maypole versions from 2.10 through 2.13 for Perl generates session ids insecurely

Maypole versions from 2.10 through 2.13 for Perl generates session ids insecurely. The session id is seeded with the system time which is available from HTTP response headers, a call to the built-in rand function, and the PID...

CVE-2025-15578 Maypole versions from 2.10 through 2.13 for Perl generates session ids insecurely

Maypole versions from 2.10 through 2.13 for Perl generates session ids insecurely. The session id is seeded with the system time which is available from HTTP response headers, a call to the built-in rand function, and the PID...

CVE-2025-15578

The Maypole Perl library, specifically versions 2.10 through 2.13 , contains a vulnerability where session IDs are generated insecurely. The root cause is the use of a cryptographically weak pseudo-random number generator (PRNG) to seed session IDs using system time (accessible via HTTP response ...

CVE-2025-40925 Starch versions 0.14 and earlier generate session ids insecurely

Starch versions 0.14 and earlier generate session ids insecurely. The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. The PID will come from a small set of numbers, and the epoch...