CVE-2026-5084: CWE-340 Generation of Predictable Numbers or Identifiers in ASPEER WebDyne::Session
WebDyne::Session versions before 3.003_704 for Perl generate 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.
AI Analysis
Technical Summary
CVE-2026-5084 describes a vulnerability in WebDyne::Session for Perl versions prior to 3.003_704 where session IDs are generated using an MD5 hash seeded by the built-in rand() function. The rand() function is seeded with a 32-bit value derived from process id, epoch time, and object reference address, but this seed is predictable and insufficient for cryptographic security. Consequently, session IDs can be predicted, potentially allowing attackers to hijack sessions. Versions 1.042 and earlier are distributed separately and may not be affected by this issue. There is no vendor advisory or patch available at this time.
Potential Impact
The vulnerability allows attackers to predict session IDs due to weak randomness in the session ID generation process. This can lead to unauthorized access to user sessions, compromising confidentiality and integrity of the affected systems. The CVSS 3.1 base score is 6.5, indicating a medium severity impact with network attack vector, low attack complexity, no privileges required, no user interaction, and partial confidentiality and integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing additional session management controls or using alternative session handling modules that provide cryptographically secure session ID generation.
CVE-2026-5084: CWE-340 Generation of Predictable Numbers or Identifiers in ASPEER WebDyne::Session
Description
WebDyne::Session versions before 3.003_704 for Perl generate 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.
CVSS v3.1
Score 6.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5084 describes a vulnerability in WebDyne::Session for Perl versions prior to 3.003_704 where session IDs are generated using an MD5 hash seeded by the built-in rand() function. The rand() function is seeded with a 32-bit value derived from process id, epoch time, and object reference address, but this seed is predictable and insufficient for cryptographic security. Consequently, session IDs can be predicted, potentially allowing attackers to hijack sessions. Versions 1.042 and earlier are distributed separately and may not be affected by this issue. There is no vendor advisory or patch available at this time.
Potential Impact
The vulnerability allows attackers to predict session IDs due to weak randomness in the session ID generation process. This can lead to unauthorized access to user sessions, compromising confidentiality and integrity of the affected systems. The CVSS 3.1 base score is 6.5, indicating a medium severity impact with network attack vector, low attack complexity, no privileges required, no user interaction, and partial confidentiality and integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider implementing additional session management controls or using alternative session handling modules that provide cryptographically secure session ID generation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CPANSec
- Date Reserved
- 2026-03-28T19:18:57.110Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a018725cbff5d8610b5d2d5
Added to database: 05/11/2026, 07:37:09 UTC
Last enriched: 08/02/2026, 19:34:15 UTC
Last updated: 08/09/2026, 08:24:23 UTC
Views: 388
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