Common Weakness Enumeration
CWE-331
AllowedInsufficient Entropy
Abstraction: Base · Status: Draft
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
221 vulnerabilities reference this CWE, most recent first.
CVE-2026-71851 (GCVE-0-2026-71851)
Vulnerability from cvelistv5 – Published: 2026-08-07 18:48 – Updated: 2026-08-08 03:05
VLAI
EPSS
VEX
Title
crypto-js: Insufficient Entropy in Cryptographic Secret Generation via Vulnerable CryptoJS Dependency Chain
Summary
crypto-js is a JavaScript library of crypto standards. Versions of crypto-js prior to 4.0.0 generate randomness in CryptoJS.lib.WordArray.random() using a custom variation of the Multiply-With-Carry pseudorandom number generator, seeded from Math.random(), instead of a cryptographically secure source. This generator was introduced in version 3.1.2-4 and remained present in nearly every 3.x release. Nominal requests for 128 or 256 bits of entropy through this function produce effective search spaces of approximately 2 to the 39th and 2 to the 47th possibilities, small enough to enumerate on commodity hardware. Downstream wallet applications that used CryptoJS.lib.WordArray.random() as the entropy source for BIP39 recovery phrases are affected, and an attacker who enumerates the reduced output space can recover the resulting private keys and control the associated funds. This issue is fixed in version 4.0.0.
Severity
9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-08 03:05 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/brix/crypto-js/security/adviso… | x_refsource_CONFIRM |
| https://github.com/brix/crypto-js/commit/b405ff59… | x_refsource_MISC |
| https://www.coinspect.com/blog/ill-bloom-investigation | x_refsource_MISC |
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CVE-2026-46474 (GCVE-0-2026-46474)
Vulnerability from cvelistv5 – Published: 2026-05-15 17:41 – Updated: 2026-05-18 15:01
VLAI
EPSS
VEX
Title
Trog::TOTP versions before 1.006 for Perl generate secrets using rand
Summary
Trog::TOTP versions before 1.006 for Perl generate secrets using rand.
Secrets were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 15:00 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TEODESIAN | Trog::TOTP |
Affected:
0 , < 1.006
(custom)
|
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CVE-2026-46473 (GCVE-0-2026-46473)
Vulnerability from cvelistv5 – Published: 2026-05-21 18:53 – Updated: 2026-05-21 21:31
VLAI
EPSS
VEX
Title
Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand
Summary
Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand.
Secrets were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 19:17 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TCHATZI | Authen::TOTP |
Affected:
0 , < 0.1.1
(custom)
|
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CVE-2026-42155 (GCVE-0-2026-42155)
Vulnerability from cvelistv5 – Published: 2026-05-15 17:05 – Updated: 2026-05-15 17:36
VLAI
EPSS
VEX
Title
Magento LTS: Weak API Session ID — Predictable MD5 of Time-Derived Inputs
Summary
Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to 20.18.0, the XML-RPC / SOAP API session ID is generated using an outdated, time-based construction rather than a Cryptographically Secure Pseudo-Random Number Generator (CSPRNG). All inputs to the MD5 hash are time-derived and non-secure. Because the resulting digest relies entirely on the timestamp and the PHP internal LCG state, the effective entropy is severely constrained. This violates the OWASP ASVS v4 requirement of ≥ 64 bits of entropy (V3.2.2) and NIST SP 800-63B standards. By narrowing the LCG window (via server state leaks or general predictability) and leveraging the lack of API rate-limiting, an attacker can generate a localized pool of candidate MD5 hashes and execute a high-speed online brute-force attack to hijack active API sessions. This vulnerability is fixed in 20.18.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 17:36 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/OpenMage/magento-lts/security/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OpenMage | magento-lts |
Affected:
< 20.18.0
|
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CVE-2026-41080 (GCVE-0-2026-41080)
Vulnerability from cvelistv5 – Published: 2026-04-16 16:52 – Updated: 2026-07-14 12:48
VLAI
EPSS
VEX
Summary
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-18 02:32 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
6 references
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.0
(semver)
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < V3.1.6
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < V3.1.6
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < V3.1.6
(custom)
|
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CVE-2026-34236 (GCVE-0-2026-34236)
Vulnerability from cvelistv5 – Published: 2026-04-01 17:04 – Updated: 2026-04-01 17:59
VLAI
EPSS
VEX
Title
Auth0 PHP SDK Insufficient Entropy in Cookie Encryption
Summary
Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 17:59 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/auth0/auth0-PHP/security/advis… | x_refsource_CONFIRM |
| https://github.com/auth0/auth0-PHP/releases/tag/8.19.0 | x_refsource_MISC |
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CVE-2026-27490 (GCVE-0-2026-27490)
Vulnerability from cvelistv5 – Published: 2026-08-21 19:59 – Updated: 2026-08-21 19:59
VLAI
EPSS
VEX
Title
Combodo iTop: Weak secret generation for inline image
Summary
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, inline images that are accessible without being authenticated are protected by a weak 24-bit pseudo-random secret. This issue has been fixed in version 3.2.3.
Severity
7.5 (High)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Combodo/iTop/security/advisori… | x_refsource_CONFIRM |
| http://github.com/Combodo/iTop/commit/9c39efd9af5… | x_refsource_MISC |
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CVE-2026-22698 (GCVE-0-2026-22698)
Vulnerability from cvelistv5 – Published: 2026-01-10 05:17 – Updated: 2026-01-12 16:48
VLAI
EPSS
VEX
Title
RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability
Summary
RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a critical vulnerability exists in the SM2 Public Key Encryption (PKE) implementation where the ephemeral nonce k is generated with severely reduced entropy. A unit mismatch error causes the nonce generation function to request only 32 bits of randomness instead of the expected 256 bits. This reduces the security of the encryption from a 128-bit level to a trivial 16-bit level, allowing a practical attack to recover the nonce k and decrypt any ciphertext given only the public key and ciphertext. This issue has been patched via commit e4f7778.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-12 16:47 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/RustCrypto/elliptic-curves/sec… | x_refsource_CONFIRM |
| https://github.com/RustCrypto/elliptic-curves/pull/1600 | x_refsource_MISC |
| https://github.com/RustCrypto/elliptic-curves/com… | x_refsource_MISC |
| https://github.com/RustCrypto/elliptic-curves/com… | x_refsource_MISC |
| https://crates.io/crates/sm2/0.14.0-pre.0 | x_refsource_MISC |
| https://crates.io/crates/sm2/0.14.0-rc.0 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RustCrypto | elliptic-curves |
Affected:
= 0.14.0-pre.0
Affected: = 0.14.0-rc.0 |
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CVE-2026-19906 (GCVE-0-2026-19906)
Vulnerability from cvelistv5 – Published: 2026-08-15 19:00 – Updated: 2026-08-17 17:39 X_Open Source
VLAI
EPSS
VEX
Title
pkp pkp-lib API Key Generation APIProfileForm.php setData entropy
Summary
A weakness has been identified in pkp pkp-lib 3.3.0/3.4.0/3.5.0. This vulnerability affects the function setData of the file classes/user/form/APIProfileForm.php of the component API Key Generation. Executing a manipulation of the argument apiKey can lead to insufficient entropy. The attack may be performed from remote. This attack is characterized by high complexity. It is stated that the exploitability is difficult. This patch is called 529b5df878e571ccc727647f7748eafc1466b041. It is best practice to apply a patch to resolve this issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 17:39 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/390119 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/390119/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19906 | third-party-advisory |
| https://vuldb.com/submit/870828 | third-party-advisory |
| https://github.com/pkp/pkp-lib/issues/12951 | issue-tracking |
| https://github.com/pkp/pkp-lib/commit/529b5df878e… | patch |
| https://github.com/pkp/pkp-lib/ | product |
Impacted products
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CVE-2026-19748 (GCVE-0-2026-19748)
Vulnerability from cvelistv5 – Published: 2026-08-13 20:15 – Updated: 2026-08-14 16:44
VLAI
EPSS
VEX
Title
Tenda CH7 Kylin Web Service CWebSessionManager_ParseSession entropy
Summary
A security vulnerability has been detected in Tenda CH7, CH7G, CH10, CP3, CP3 Pro, CP7, TC3B14C, TC3B15C, TC3T14C and TC3T15C up to 20260625. Affected is the function CWebSessionManager_ParseSession of the file /user/bin/Kylin of the component Kylin Web Service. Such manipulation of the argument SESSION leads to insufficient entropy. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is told to be difficult.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:43 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/389499 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/389499/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19748 | third-party-advisory |
| https://vuldb.com/submit/868490 | third-party-advisory |
| https://github.com/howitouchyou/Tenda-Smart-Camer… | related |
| https://www.tenda.com.cn/ | product |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Tenda | CH7 |
Affected:
20260625
cpe:2.3:h:tenda:ch7:*:*:*:*:*:*:*:* |
|
| Tenda | CH7G |
Affected:
20260625
cpe:2.3:h:tenda:ch7g:*:*:*:*:*:*:*:* |
|
| Tenda | CH10 |
Affected:
20260625
cpe:2.3:h:tenda:ch10:*:*:*:*:*:*:*:* |
|
| Tenda | CP3 |
Affected:
20260625
cpe:2.3:h:tenda:cp3:*:*:*:*:*:*:*:* |
|
| Tenda | CP3 Pro |
Affected:
20260625
cpe:2.3:h:tenda:cp3_pro:*:*:*:*:*:*:*:* |
|
| Tenda | CP7 |
Affected:
20260625
cpe:2.3:h:tenda:cp7:*:*:*:*:*:*:*:* |
|
| Tenda | TC3B14C |
Affected:
20260625
cpe:2.3:h:tenda:tc3b14c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3B15C |
Affected:
20260625
cpe:2.3:h:tenda:tc3b15c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3T14C |
Affected:
20260625
cpe:2.3:h:tenda:tc3t14c:*:*:*:*:*:*:*:* |
|
| Tenda | TC3T15C |
Affected:
20260625
cpe:2.3:h:tenda:tc3t15c:*:*:*:*:*:*:*:* |
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Mitigation
Implementation
Determine the necessary entropy to adequately provide for randomness and predictability. This can be achieved by increasing the number of bits of objects such as keys and seeds.
CAPEC-59: Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.