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CWE-340
Generation of Predictable Numbers or Identifiers
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
CVE-2026-5084 (GCVE-0-2026-5084)
Vulnerability from cvelistv5 – Published: 2026-05-11 06:37 – Updated: 2026-05-11 16:53
VLAI
Title
WebDyne::Session versions through 2.075 for Perl generates the session id insecurely
Summary
WebDyne::Session versions through 2.075 for Perl generates the session id insecurely.
The session handler generates the session id from an MD5 hash seeded with a call to the built-in rand() function. The rand function is passed a maximum value based on the process id, the epoch time and the reference address of the object, but this information will have no effect on the overall quality of the seed of the message digest.
The rand function is seeded by 32-bits and is predictable. It is considered unsuitable for cryptographic purposes.
Predictable session ids could allow an attacker to gain access to systems.
Note that WebDyne::Session versions 1.042 and earlier appear to be in separate distributions from WebDyne.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ASPEER | WebDyne::Session |
Affected:
0 , ≤ 2.075
(custom)
|
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CVE-2026-5085 (GCVE-0-2026-5085)
Vulnerability from cvelistv5 – Published: 2026-04-13 06:56 – Updated: 2026-04-13 15:30
VLAI
Title
Solstice::Session versions through 1440 for Perl generates session ids insecurely
Summary
Solstice::Session versions through 1440 for Perl generates session ids insecurely.
The _generateSessionID method returns an MD5 digest seeded by the epoch time, a random hash reference, a call to the built-in rand() function and the process id.
The same method is used in the _generateID method in Solstice::Subsession, which is part of the same distribution.
The epoch time may be guessed, if it is not leaked in the HTTP Date header. Stringified hash refences will contain predictable content. The built-in rand() function is seeded by 16-bits and is unsuitable for security purposes. The process id comes from a small set of numbers.
Predictable session ids could allow an attacker to gain access to systems.
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 | |
|---|---|---|---|
| MCRAWFOR | Solstice::Session |
Affected:
0 , ≤ 1440
(custom)
|
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CVE-2026-56016 (GCVE-0-2026-56016)
Vulnerability from cvelistv5 – Published: 2026-07-01 06:46 – Updated: 2026-07-01 17:36
VLAI
Title
CGI::Session::ID::md5 versions before 4.49 for Perl generate predictable session ids from low-entropy sources
Summary
CGI::Session::ID::md5 versions before 4.49 for Perl generate predictable session ids from low-entropy sources.
The generate_id method builds the session id from a MD5 digest of the process id, the epoch time, and the built-in rand() function. All three are predictable, low-entropy sources: the PID is drawn from a small range, the epoch time can be guessed or read from the HTTP Date header, and Perl's rand() is unsuitable for security purposes because it is predictable and reversible.
An attacker who predicts a session id can impersonate the corresponding session and bypass authentication.
Severity
5.9 (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 | |
|---|---|---|---|
| MARKSTOS | CGI::Session::ID::md5 |
Affected:
0 , < 4.49
(custom)
|
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CVE-2026-8503 (GCVE-0-2026-8503)
Vulnerability from cvelistv5 – Published: 2026-05-15 11:06 – Updated: 2026-05-15 15:37
VLAI
Title
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids
Summary
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids.
Apache::Session::Generate::SHA256 generated session ids insecurely. The default session id generator returns a SHA-256 hash of the built-in rand() function, the epoch time, and the PID, that is hashed again. These are predictable, low-entropy sources. Predicable session ids could allow an attacker to gain access to systems.
Note that version 1.3.19 has a fallback without warning to use insecure session generation method if the call to Crypt::URandom::urandom fails. However, this is unlikely as Crypt::URandom is a hardcoded requirement of the module.
This issue is similar to CVE-2025-40931 for Apache::Session::Generate::MD5.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GUIMARD | Apache::Session::Generate::SHA256 |
Affected:
0 , < 1.3.19
(custom)
|
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CVE-2026-9219 (GCVE-0-2026-9219)
Vulnerability from cvelistv5 – Published: 2026-06-25 23:10 – Updated: 2026-06-26 12:38
VLAI
Title
Setracker2 Children's Smartwatch Ecosystem Generation of Predictable Numbers or Identifiers
Summary
Setracker2 Android Companion App com.tgelec.setracker versions 3.1.5 and prior have a predictable registration ID derived from IMEI. The enrollment system lacks additional authentication before assignment. If an attacker is able to obtain the registration ID, they would be able to arbitrarily enroll watches belonging to other users.
Severity
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
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Shenzhen i365-Tech Co. Ltd. | Setracker2 Parental Control App (Android) package com.tgelec.setracker |
Affected:
0 , ≤ 3.1.5
(custom)
|
Credits
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CVE-2026-9692 (GCVE-0-2026-9692)
Vulnerability from cvelistv5 – Published: 2026-06-18 17:53 – Updated: 2026-06-18 18:47
VLAI
Title
Mojolicious::Sessions::Storable versions through 0.05 for Perl generate session ids insecurely
Summary
Mojolicious::Sessions::Storable versions through 0.05 for Perl generate session ids insecurely.
The default session id generator returns a SHA-1 hash seeded with the built-in rand function, the epoch time, the heap address of an anonymous hash, and the PID.
These are predictable or low-entropy sources that are unsuitable for security purposes.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://security.metacpan.org/patches/M/Mojolicio… | patch |
| https://metacpan.org/release/HAYAJO/Mojolicious-P… | |
| https://www.cve.org/CVERecord?id=CVE-2025-40923 | vendor-advisoryrelatedvdb-entry |
| https://security.metacpan.org/docs/guides/random-… | technical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HAYAJO | Mojolicious::Sessions::Storable |
Affected:
0 , ≤ 0.05
(custom)
|
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CVE-2026-9733 (GCVE-0-2026-9733)
Vulnerability from cvelistv5 – Published: 2026-06-23 07:05 – Updated: 2026-06-23 14:18
VLAI
Title
Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter
Summary
Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.
When no state generator is specified in the constructor, the module defaults to using a SHA-1 hash of predictable and low-entropy sources, including the epoch time (which is leaked via the HTTP Date header) and a call to Perl's built-in rand function.
A predictable state allows an attacker to hijack another user's session through cross site request forgery (CSRF).
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HAYAJO | Mojolicious::Plugin::Web::Auth::OAuth2 |
Affected:
0 , ≤ 0.17
(custom)
|
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.