Common Weakness Enumeration
CWE-338
AllowedUse of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Abstraction: Base · Status: Draft
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
293 vulnerabilities reference this CWE, most recent first.
CVE-2025-54883 (GCVE-0-2025-54883)
Vulnerability from cvelistv5 – Published: 2025-08-05 23:36 – Updated: 2025-08-06 20:30
VLAI
EPSS
VEX
Title
Vision UI's security-kit Contains Cryptographic Weakness
Summary
Vision UI is a collection of enterprise-grade, dependency-free modules for modern web projects. In versions 1.4.0 and below, the getSecureRandomInt function in security-kit versions prior to 3.5.0 (packaged in Vision-ui <= 1.4.0) contains a critical cryptographic weakness. Due to a silent 32-bit integer overflow in its internal masking logic, the function fails to produce a uniform distribution of random numbers when the requested range between min and max is larger than 2³². The root cause is the use of a 32-bit bitwise left-shift operation (<<) to generate a bitmask for the rejection sampling algorithm. This causes the mask to be incorrect for any range requiring 32 or more bits of entropy. This issue is fixed in version 1.5.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/DavidOsipov/Vision-ui/security… | x_refsource_CONFIRM |
| https://github.com/DavidOsipov/Vision-ui/commit/3… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DavidOsipov | Vision-ui |
Affected:
< 1.5.0
|
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CVE-2025-46653 (GCVE-0-2025-46653)
Vulnerability from cvelistv5 – Published: 2025-04-26 00:00 – Updated: 2025-04-29 15:22
VLAI
EPSS
VEX
Summary
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-formidable | Formidable |
Affected:
2.1.0 , < 3.5.3
(semver)
|
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CVE-2025-41731 (GCVE-0-2025-41731)
Vulnerability from cvelistv5 – Published: 2025-11-10 07:44 – Updated: 2025-11-10 15:20
VLAI
EPSS
VEX
Title
Jumo: Insufficient entropy in PRNG may lead to root access
Summary
A vulnerability was identified in the password generation algorithm when accessing the debug-interface. An unauthenticated local attacker with knowledge of the password generation timeframe might be able to brute force the password in a timely manner and thus gain root access to the device if the debug interface is still enabled.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
1 reference
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Jumo | variTRON300 |
Affected:
0.0.0.0 , < 9.0.2.5
(semver)
|
|
| Jumo | variTRON500 |
Affected:
0.0.0.0 , < 9.0.2.5
(semver)
|
|
| Jumo | variTRON500 touch |
Affected:
0.0.0.0 , < 9.0.2.5
(semver)
|
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CVE-2025-40933 (GCVE-0-2025-40933)
Vulnerability from cvelistv5 – Published: 2025-09-17 14:25 – Updated: 2025-09-17 17:21
VLAI
EPSS
VEX
Title
Apache::AuthAny::Cookie v0.201 or earlier for Perl generates session ids insecurely
Summary
Apache::AuthAny::Cookie v0.201 or earlier for Perl generates session ids insecurely.
Session ids are generated using an MD5 hash of the epoch time and a call to the built-in rand function. The epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| KGOLDOV | Apache::AuthAny |
Affected:
0.19 , ≤ 0.201
(custom)
|
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CVE-2025-40932 (GCVE-0-2025-40932)
Vulnerability from cvelistv5 – Published: 2026-02-26 23:33 – Updated: 2026-02-27 18:41
VLAI
EPSS
VEX
Title
Apache::SessionX versions through 2.01 for Perl create insecure session id
Summary
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 come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://metacpan.org/release/GRICHTER/Apache-Sess… | related |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GRICHTER | Apache::SessionX |
Affected:
0 , ≤ 2.01
(custom)
|
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CVE-2025-40931 (GCVE-0-2025-40931)
Vulnerability from cvelistv5 – Published: 2026-03-05 01:41 – Updated: 2026-04-21 02:42
VLAI
EPSS
VEX
Title
Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id
Summary
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 from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Predicable session ids could allow an attacker to gain access to systems.
Note that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
10 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CHORNY | Apache::Session::Generate::MD5 |
Affected:
0 , ≤ 1.94
(custom)
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CVE-2025-40926 (GCVE-0-2025-40926)
Vulnerability from cvelistv5 – Published: 2026-03-05 01:24 – Updated: 2026-04-21 02:42
VLAI
EPSS
VEX
Title
Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely
Summary
Plack::Middleware::Session::Simple versions before 0.05 for Perl generates session ids insecurely.
The default 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 epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predictable session ids could allow an attacker to gain access to systems.
Plack::Middleware::Session::Simple is intended to be compatible with Plack::Middleware::Session, which had a similar security issue CVE-2025-40923.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/KAZEBURO/Plack-Middl… | |
| https://github.com/kazeburo/Plack-Middleware-Sess… | issue-tracking |
| https://github.com/kazeburo/Plack-Middleware-Sess… | patch |
| https://www.cve.org/CVERecord?id=CVE-2025-40923 | vendor-advisoryrelatedvdb-entry |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
| https://metacpan.org/release/KAZEBURO/Plack-Middl… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| KAZEBURO | Plack::Middleware::Session::Simple |
Affected:
0 , < 0.05
(custom)
|
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CVE-2025-40925 (GCVE-0-2025-40925)
Vulnerability from cvelistv5 – Published: 2025-09-20 12:31 – Updated: 2025-09-22 17:27
VLAI
EPSS
VEX
Title
Starch versions 0.14 and earlier generate session ids insecurely
Summary
Starch versions 0.14 and earlier generate session ids insecurely.
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Predicable session ids could allow an attacker to gain access to systems.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
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CVE-2025-40924 (GCVE-0-2025-40924)
Vulnerability from cvelistv5 – Published: 2025-07-17 13:33 – Updated: 2025-07-17 19:53
VLAI
EPSS
VEX
Title
Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely
Summary
Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely.
The session id is generated from a (usually SHA-1) hash of a simple counter, the epoch time, the built-in rand function, the PID and the current Catalyst context. This information is of low entropy. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HAARG | Catalyst::Plugin::Session |
Affected:
0.01 , < 0.44
(custom)
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CVE-2025-40923 (GCVE-0-2025-40923)
Vulnerability from cvelistv5 – Published: 2025-07-16 13:05 – Updated: 2025-11-04 21:10
VLAI
EPSS
VEX
Title
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely
Summary
Plack-Middleware-Session before version 0.35 for Perl generates session ids insecurely.
The default 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 epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
Predicable session ids could allow an attacker to gain access to systems.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MIYAGAWA | Plack::Middleware::Session |
Affected:
0.01 , < 0.35
(custom)
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Mitigation
Implementation
Use functions or hardware which use a hardware-based random number generation for all crypto. This is the recommended solution. Use CyptGenRandom on Windows, or hw_rand() on Linux.
No CAPEC attack patterns related to this CWE.