Common Weakness Enumeration
CWE-340
Allowed-with-ReviewGeneration of Predictable Numbers or Identifiers
Abstraction: Class · Status: Incomplete
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
69 vulnerabilities reference this CWE, most recent first.
CVE-2026-2439 (GCVE-0-2026-2439)
Vulnerability from cvelistv5 – Published: 2026-02-16 21:25 – Updated: 2026-02-17 14:45
VLAI
EPSS
VEX
Title
Concierge::Sessions versions from 0.8.1 before 0.8.5 for Perl generate insecure session ids
Summary
Concierge::Sessions versions from 0.8.1 before 0.8.5 for Perl generate insecure session ids. The generate_session_id function in Concierge::Sessions::Base defaults to using the uuidgen command to generate a UUID, with a fallback to using Perl's built-in rand function. Neither of these methods are secure, and attackers are able to guess session_ids that can grant them access to systems. Specifically,
* There is no warning when uuidgen fails. The software can be quietly using the fallback rand() function with no warnings if the command fails for any reason.
* The uuidgen command will generate a time-based UUID if the system does not have a high-quality random number source, because the call does not explicitly specify the --random option. Note that the system time is shared in HTTP responses.
* UUIDs are identifiers whose mere possession grants access, as per RFC 9562.
* The output of the built-in rand() function is predictable and unsuitable for security applications.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BVA | Concierge::Sessions |
Affected:
0.8.1 , < 0.8.5
(custom)
|
Credits
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CVE-2025-69286 (GCVE-0-2025-69286)
Vulnerability from cvelistv5 – Published: 2025-12-31 21:52 – Updated: 2026-01-02 14:35
VLAI
EPSS
VEX
Title
RAGFlow has Predictable Token Generation Leading to Authentication Bypass Vulnerability
Summary
RAGFlow is an open-source RAG (Retrieval-Augmented Generation) engine. In versions prior to 0.22.0, the use of an insecure key generation algorithm in the API key and beta (assistant/agent share auth) token generation process allows these tokens to be mutually derivable. Specifically, both tokens are generated using the same `URLSafeTimedSerializer` with predictable inputs, enabling an unauthorized user who obtains the shared assistant/agent URL to derive the personal API key. This grants them full control over the assistant/agent owner's account. Version 0.22.0 fixes the issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/infiniflow/ragflow/security/ad… | x_refsource_CONFIRM |
| https://github.com/infiniflow/ragflow/commit/a3bb… | x_refsource_MISC |
| https://github.com/infiniflow/ragflow/blob/v0.20.… | x_refsource_MISC |
| https://github.com/infiniflow/ragflow/blob/v0.20.… | x_refsource_MISC |
| https://github.com/infiniflow/ragflow/blob/v0.20.… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| infiniflow | ragflow |
Affected:
< 0.22.0
|
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CVE-2025-68701 (GCVE-0-2025-68701)
Vulnerability from cvelistv5 – Published: 2026-01-13 19:21 – Updated: 2026-01-13 19:55
VLAI
EPSS
VEX
Title
Jervis has Deterministic AES IV Derivation from Passphrase
Summary
Jervis is a library for Job DSL plugin scripts and shared Jenkins pipeline libraries. Prior to 2.2, Jervis uses deterministic AES IV derivation from a passphrase. This vulnerability is fixed in 2.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/samrocketman/jervis/security/a… | x_refsource_CONFIRM |
| https://github.com/samrocketman/jervis/commit/c39… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| samrocketman | jervis |
Affected:
< 2.2
|
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CVE-2025-62294 (GCVE-0-2025-62294)
Vulnerability from cvelistv5 – Published: 2025-11-20 15:43 – Updated: 2025-11-20 18:59
VLAI
EPSS
VEX
Title
Predictable Generation of Password Recovery Token
Summary
SOPlanning is vulnerable to Predictable Generation of Password Recovery Token. Due to weak mechanism of generating recovery tokens, a malicious attacker is able to brute-force all possible values and takeover any account in reasonable amount of time.
This issue was fixed in version 1.55.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://cert.pl/en/posts/2025/11/CVE-2025-62293 | third-party-advisory |
| https://www.soplanning.org/en/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SOPlanning | SOPlanning |
Affected:
0 , < 1.55
(semver)
|
Date Public
2025-11-20 10:55
Credits
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CVE-2025-59452 (GCVE-0-2025-59452)
Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-11-26 15:21
VLAI
EPSS
VEX
Summary
The YoSmart YoLink API through 2025-10-02 uses an endpoint URL that is derived from a device's MAC address along with an MD5 hash of non-secret information, such as a key that begins with cf50.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| YoSmart | YoLink API |
Affected:
0 , ≤ 2025-10-02
(custom)
|
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CVE-2025-58424 (GCVE-0-2025-58424)
Vulnerability from cvelistv5 – Published: 2025-10-15 13:55 – Updated: 2026-02-26 16:57
VLAI
EPSS
VEX
Title
BIG-IP TMM vulnerability
Summary
On BIG-IP systems, undisclosed traffic can cause data corruption and unauthorized data modification in protocols which do not have message integrity protection. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-340 - Generation of Predictable Numbers or Identifiers
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000151297 | vendor-advisory |
Impacted products
Date Public
2025-10-15 14:00
Credits
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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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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.