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.
340 vulnerabilities reference this CWE, most recent first.
CVE-2026-104356 (GCVE-0-2026-104356)
Vulnerability from cvelistv5 – Published: 2026-10-01 21:21 – Updated: 2026-10-01 21:21 X_Open Source
VLAI
EPSS
VEX
Title
PictShare < 3.7.1 Predictable Delete Code via rand()
Summary
PictShare before version 3.7.1 contains a weak randomness vulnerability where the getRandomString() function uses the non-cryptographic rand() PRNG to generate the delete_code authorization token in src/inc/core.php. Attackers can predict or infer the PRNG state to guess valid delete_code values and perform unauthorized deletion of hosted files without needing to read the code from the info endpoint.
Severity
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/HaschekSolutions/pictshare/com… | issue-trackingrelease-notes |
| https://github.com/HaschekSolutions/pictshare/rel… | patch |
| https://www.vulncheck.com/advisories/pictshare-pr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HaschekSolutions | pictshare |
Affected:
2.0.0 , < 3.7.1
(semver)
cpe:2.3:a:hascheksolutions:pictshare:*:*:*:*:*:*:*:* |
Date Public
2026-10-01 00:00
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CVE-2026-94456 (GCVE-0-2026-94456)
Vulnerability from cvelistv5 – Published: 2026-09-22 16:11 – Updated: 2026-09-22 18:11
VLAI
EPSS
VEX
Title
Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys
Summary
Postiz generates security-sensitive credentials using `Math.random()` instead of a cryptographically secure source. The same helper is used for OAuth access tokens, authorization codes, client secrets, organization API keys, and PKCE verifiers, meaning these credentials depend entirely on V8’s deterministic xorshift128+ PRNG state.
An unauthenticated OAuth dynamic client registration endpoint exposes freshly generated client credentials, giving attackers enough consecutive PRNG output to reconstruct that internal state. Once recovered, they can deterministically derive past and future values produced by the same generator, potentially compromising credentials belonging to other users and organizations.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:10 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gitroomhq/postiz-app | product |
| https://github.com/gitroomhq/postiz-app/releases/… | release-notes |
| https://github.com/gitroomhq/postiz-app/commit/92… | patch |
| https://gadvisory.org/advisories/PSA-2026-TD98KY | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GitroomHQ | postiz-app |
Affected:
0 , < 2.4.0
(semver)
|
Date Public
2026-09-22 14:17
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CVE-2026-94107 (GCVE-0-2026-94107)
Vulnerability from cvelistv5 – Published: 2026-09-20 11:09 – Updated: 2026-09-21 16:48
VLAI
EPSS
VEX
Title
NivoCart through 2.4.0 Predictable Administrator Password Reset Token
Summary
NivoCart through 2.4.0 contains a predictable password reset token vulnerability in the forgotten.php endpoint that generates recovery codes using substr(md5(mt_rand()), 0, 10). Attackers who know an administrator's email address can request a password reset and predict the token to gain administrative account access without rate limiting or expiration.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 16:47 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/nivocart/nivocart/issues/25 | issue-tracking |
| https://github.com/nivocart/nivocart/blob/6ea6600… | technical-description |
| https://github.com/nivocart/nivocart/blob/6ea6600… | technical-description |
| https://github.com/nivocart/nivocart | product |
| https://www.vulncheck.com/advisories/nivocart-thr… | third-party-advisory |
Date Public
2026-09-19 00:00
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CVE-2026-93868 (GCVE-0-2026-93868)
Vulnerability from cvelistv5 – Published: 2026-09-18 19:56 – Updated: 2026-09-24 14:23
VLAI
EPSS
VEX
Title
Cotonti through 1.0.0 Predictable Password Recovery Token via Weak PRNG
Summary
Cotonti through 1.0.0 derives password recovery validation tokens from md5(microtime()) in users.passrecover.php, creating a predictable token space of approximately one million values per second. Unauthenticated attackers can read the server Date header, precompute candidate tokens within a narrow time window, and probe them against the passrecover authentication endpoint to reset any account password including administrators.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 20:19 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/Cotonti/Cotonti/issues/1890 | issue-tracking |
| https://github.com/Cotonti/Cotonti/pull/1898 | patchissue-tracking |
| https://github.com/Cotonti/Cotonti/blob/1.0.0/mod… | technical-description |
| https://github.com/Cotonti/Cotonti | product |
| https://www.vulncheck.com/advisories/cotonti-thro… | third-party-advisory |
Impacted products
Date Public
2026-09-17 00:00
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CVE-2026-92749 (GCVE-0-2026-92749)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:32 – Updated: 2026-09-17 14:00
VLAI
EPSS
VEX
Title
SafeLine through 9.4.1 Authentication Bypass via Weak Session Secret
Summary
SafeLine through 9.4.1 derives the management console session-signing secret from a time-seeded math/rand generator, allowing attackers to reconstruct the key offline. Unauthenticated remote attackers who can bound the install timestamp can regenerate the secret and forge valid administrator session cookies to gain control of protected sites.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 13:58 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/chaitin/SafeLine/issues/1298 | issue-tracking |
| https://github.com/chaitin/SafeLine | product |
| https://github.com/chaitin/SafeLine/blob/v9.4.1/m… | technical-description |
| https://github.com/chaitin/SafeLine/blob/v9.4.1/m… | technical-description |
| https://www.vulncheck.com/advisories/safeline-thr… | third-party-advisory |
Date Public
2026-06-20 00:00
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CVE-2026-92298 (GCVE-0-2026-92298)
Vulnerability from cvelistv5 – Published: 2026-09-16 01:57 – Updated: 2026-09-17 17:04
VLAI
EPSS
VEX
Title
EspoCRM through 10.0.8 Weak Token Generation via rand()
Summary
EspoCRM through 10.0.8 uses PHP's rand() function to generate tokens for lead-capture opt-in, event invitation, and campaign URLs instead of a cryptographically secure generator. Remote unauthenticated attackers can guess these roughly 31-bit tokens to confirm opt-ins, accept or decline event invitations on behalf of other contacts, and access event details.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:04 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://gist.github.com/kazisabu/9e3109aab24245fd… | technical-description |
| https://github.com/espocrm/espocrm/commit/8e5555c… | patch |
| https://github.com/espocrm/espocrm/blob/10.0.8/ap… | technical-description |
| https://github.com/espocrm/espocrm/blob/10.0.8/ap… | technical-description |
| https://github.com/espocrm/espocrm | product |
| https://www.vulncheck.com/advisories/espocrm-thro… | third-party-advisory |
Impacted products
Date Public
2026-09-12 00:00
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CVE-2026-79901 (GCVE-0-2026-79901)
Vulnerability from cvelistv5 – Published: 2026-10-01 13:52 – Updated: 2026-10-01 14:43
VLAI
EPSS
VEX
Title
Predictable Active Directory service-account passwords in BoKS Manager
Summary
In deployments using BoKS keytab management, affected versions of boks_keytabmd generate Active Directory service-account passwords from a predictable pseudo-random sequence seeded with the current Unix timestamp. An attacker who knows the service principal and can estimate the password-change time can reproduce a limited candidate set and verify candidates offline.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 14:42 UTC
CWE
- CWE-338 - Use of cryptographically weak Pseudo-Random number generator (PRNG)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fortra | BoKS Manager boks-server |
Affected:
0 , < 9.0.0.6
(semver)
|
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CVE-2026-74887 (GCVE-0-2026-74887)
Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-10-01 15:20
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.0 Insecure Random Import in PQC Module
Summary
openssl_encrypt before 1.4.0 imports Python's non-cryptographic 'random' module (Mersenne Twister PRNG) at line 15 of openssl_encrypt/modules/pqc.py. No direct calls to random.* were present in the code, so no cryptographic operation is currently affected; however, the import creates a hazard that future code could inadvertently use random.randint() instead of a cryptographically secure alternative (secrets/os.urandom), producing predictable values since the Mersenne Twister state can be recovered from approximately 624 outputs. Fixed by removing the import in 1.4.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 14:38 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.0
(semver)
Unaffected: 1.4.0 (semver) cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:* |
Date Public
2026-02-10 00:00
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CVE-2026-74874 (GCVE-0-2026-74874)
Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-10-01 15:20
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.0 Weak PRNG Steganography Pixel Selection
Summary
openssl_encrypt versions before 1.4.0 use Python's non-cryptographic random module for steganographic pixel selection in the generate_pseudorandom_sequence function. Attackers who know the password can recover the Mersenne Twister state from approximately 624 outputs and predict pixel locations containing hidden data for extraction.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 15:44 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.0
(semver)
Unaffected: 1.4.0 (semver) cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:* |
Date Public
2026-02-10 00:00
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CVE-2026-73567 (GCVE-0-2026-73567)
Vulnerability from cvelistv5 – Published: 2026-08-13 17:40 – Updated: 2026-08-14 18:09
VLAI
EPSS
VEX
Title
sm-crypto: Predictable SM2 key generation in Node.js: default RNG uses Math.random + wall clock
Summary
sm-crypto provides JavaScript implementations of the Chinese cryptographic algorithms SM2, SM3, and SM4. Prior to 0.5.0, the default no-argument sm2.generateKeyPairHex() path in Node.js uses the module-wide SecureRandom instance in src/sm2/utils.js, supplied by jsbn@1.1.0, which seeds an ARC4 stream from Math.random() and new Date().getTime() because window.crypto.getRandomValues is unavailable even though globalThis.crypto exists. An attacker who can observe the process's Math.random() outputs and estimate the key-generation time can reconstruct the seed, recover generated SM2 private keys, and predict signing ephemeral scalars used to forge signatures. This issue is fixed in version 0.5.0.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 17:55 UTC
CWE
- CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/JuneAndGreen/sm-crypto/securit… | x_refsource_CONFIRM |
| https://github.com/JuneAndGreen/sm-crypto/commit/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| JuneAndGreen | sm-crypto |
Affected:
< 0.5.0
|
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},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.