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-2025-21617 (GCVE-0-2025-21617)
Vulnerability from cvelistv5 – Published: 2025-01-06 19:23 – Updated: 2025-01-06 19:42
VLAI
EPSS
VEX
Title
Guzzle OAuth Subscriber has insufficient nonce entropy
Summary
Guzzle OAuth Subscriber signs Guzzle requests using OAuth 1.0. Prior to 0.8.1, Nonce generation does not use sufficient entropy nor a cryptographically secure pseudorandom source. This can leave servers vulnerable to replay attacks when TLS is not used. This vulnerability is fixed in 0.8.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/guzzle/oauth-subscriber/securi… | x_refsource_CONFIRM |
| https://github.com/guzzle/oauth-subscriber/commit… | x_refsource_MISC |
| https://github.com/guzzle/oauth-subscriber/blob/0… | x_refsource_MISC |
| https://github.com/guzzle/oauth-subscriber/releas… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| guzzle | oauth-subscriber |
Affected:
< 0.8.1
|
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CVE-2025-15618 (GCVE-0-2025-15618)
Vulnerability from cvelistv5 – Published: 2026-03-31 10:04 – Updated: 2026-03-31 18:18
VLAI
EPSS
VEX
Title
Business::OnlinePayment::StoredTransaction versions through 0.01 for Perl uses an insecure secret key
Summary
Business::OnlinePayment::StoredTransaction versions through 0.01 for Perl uses an insecure secret key.
Business::OnlinePayment::StoredTransaction generates a secret key by using a MD5 hash of a single call to the built-in rand function, which is unsuitable for cryptographic use.
This key is intended for encrypting credit card transaction data.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MOCK | Business::OnlinePayment::StoredTransaction |
Affected:
0 , ≤ 0.01
(custom)
|
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CVE-2025-15604 (GCVE-0-2025-15604)
Vulnerability from cvelistv5 – Published: 2026-03-28 18:43 – Updated: 2026-04-01 14:13
VLAI
EPSS
VEX
Title
Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions
Summary
Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions.
In versions 6.06 through 6.16, the random_string function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes by concatenating a SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. 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.
Before version 6.06, there was no fallback when /dev/urandom was not available.
Before version 6.04, the random_string function used the built-in rand() function to generate a mixed-case alphanumeric string.
This function may be used for generating session ids, generating secrets for signing or encrypting cookie session data and generating tokens used for Cross Site Request Forgery (CSRF) protection.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://metacpan.org/release/TOKUHIROM/Amon2-6.17… | |
| https://metacpan.org/release/TOKUHIROM/Amon2-6.17… | release-notes |
| https://github.com/tokuhirom/Amon/pull/135 | issue-tracking |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
| http://www.openwall.com/lists/oss-security/2026/03/28/4 |
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CVE-2025-15578 (GCVE-0-2025-15578)
Vulnerability from cvelistv5 – Published: 2026-02-16 21:18 – Updated: 2026-02-17 14:46
VLAI
EPSS
VEX
Title
Maypole versions from 2.10 through 2.13 for Perl generates session ids insecurely
Summary
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.
Severity
9.8 (Critical)
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
1 reference
| URL | Tags |
|---|---|
| https://metacpan.org/dist/Maypole/source/lib/Mayp… | related |
Credits
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CVE-2025-3495 (GCVE-0-2025-3495)
Vulnerability from cvelistv5 – Published: 2025-04-16 03:10 – Updated: 2025-08-19 00:11
VLAI
EPSS
VEX
Title
COMMGR - Insufficient Randomization Authentication Bypass
Summary
Delta Electronics COMMGR v1 and v2 uses insufficiently randomized values to generate session IDs (CWE-338). An attacker could easily brute force a session ID and load and execute arbitrary code.
Severity
9.8 (Critical)
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
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Delta Electronics | COMMGR |
Affected:
0
(custom)
|
Date Public
2025-04-16 03:00
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CVE-2025-2814 (GCVE-0-2025-2814)
Vulnerability from cvelistv5 – Published: 2025-04-12 23:41 – Updated: 2025-09-05 13:21
VLAI
EPSS
VEX
Title
Crypt::CBC versions between 1.21 and 3.05 for Perl may use insecure rand() function for cryptographic functions
Summary
Crypt::CBC versions between 1.21 and 3.05 for Perl may use the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
This issue affects operating systems where "/dev/urandom'" is unavailable. In that case, Crypt::CBC will fallback to use the insecure rand() function.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| LDS | Crypt::CBC |
Affected:
1.21 , ≤ 3.05
(custom)
|
Credits
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CVE-2025-1860 (GCVE-0-2025-1860)
Vulnerability from cvelistv5 – Published: 2025-03-28 00:56 – Updated: 2025-09-05 13:20
VLAI
EPSS
VEX
Title
Data::Entropy for Perl uses insecure rand() function for cryptographic functions
Summary
Data::Entropy for Perl 0.007 and earlier use the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ZEFRAM | Data::Entropy |
Affected:
0 , < 0.008
(custom)
|
Credits
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CVE-2025-1828 (GCVE-0-2025-1828)
Vulnerability from cvelistv5 – Published: 2025-03-10 23:51 – Updated: 2025-09-09 13:56
VLAI
EPSS
VEX
Title
Perl's Crypt::Random module after 1.05 and before 1.56 may use rand() function for cryptographic functions
Summary
Crypt::Random Perl package 1.05 through 1.55 may use rand() function, which is not cryptographically strong, for cryptographic functions.
If the Provider is not specified and /dev/urandom or an Entropy Gathering Daemon (egd) service is not available Crypt::Random will default to use the insecure Crypt::Random::rand provider.
In particular, Windows versions of perl will encounter this issue by default.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| perl | Crypt::Random |
Affected:
1.05 , < 1.56
(custom)
|
Credits
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CVE-2025-1805 (GCVE-0-2025-1805)
Vulnerability from cvelistv5 – Published: 2025-04-02 12:53 – Updated: 2025-04-03 19:11
VLAI
EPSS
VEX
Title
Crypt::Salt for Perl uses insecure rand() function when generating salts for cryptographic purposes
Summary
Crypt::Salt for Perl version 0.01 uses insecure rand() function when generating salts for cryptographic purposes.
Severity
5.3 (Medium)
SSVC
Exploitation: none
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 | |
|---|---|---|---|
| HACHI | Crypt::Salt |
Affected:
0.01
(custom)
|
Credits
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CVE-2025-1796 (GCVE-0-2025-1796)
Vulnerability from cvelistv5 – Published: 2025-03-20 10:08 – Updated: 2025-10-15 12:50
VLAI
EPSS
VEX
Title
Admin account takeover through weak Pseudo-Random number generator used in generating password reset codes in langgenius/dify
Summary
A vulnerability in langgenius/dify v0.10.1 allows an attacker to take over any account, including administrator accounts, by exploiting a weak pseudo-random number generator (PRNG) used for generating password reset codes. The application uses `random.randint` for this purpose, which is not suitable for cryptographic use and can be cracked. An attacker with access to workflow tools can extract the PRNG output and predict future password reset codes, leading to a complete compromise of the application.
Severity
7.5 (High)
SSVC
Exploitation: poc
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
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| langgenius | langgenius/dify |
Affected:
unspecified , ≤ latest
(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.