CVE-2026-5082
Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id
Description
Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id. The generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. 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. Amon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604. Note that the author has deprecated this module.
INFO
Published Date :
April 8, 2026, 6:16 a.m.
Last Modified :
July 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Amon2::Plugin::Web::CSRFDefender to a secure version.
- Remove or replace the deprecated module.
- Ensure session IDs are generated securely.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5082.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5082 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5082
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5082 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5082 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: Amon2::Plugin::Web::CSRFDefender de TOKUHIROM, Description: Las versiones de Amon2::Plugin::Web::CSRFDefender de la 7.00 a la 7.03 para Perl generan un ID de sesión inseguro. La función generate_session_id intentará leer bytes del dispositivo /dev/urandom, pero si este no está disponible, entonces genera bytes usando un hash SHA-1 inicializado con la función rand() incorporada, el PID y el tiempo de época de alta resolución. El PID provendrá de un pequeño conjunto de números, y el tiempo de época puede ser adivinado, si no se filtra del encabezado HTTP Date. La función rand incorporada no es adecuada para uso criptográfico. Las versiones de Amon2::Plugin::Web::CSRFDefender anteriores a la 7.00 formaban parte de Amon2, el cual era vulnerable a IDs de sesión inseguros debido a CVE-2025-15604. Tenga en cuenta que el autor ha desaprobado este módulo. -
CVE Modified by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/tokuhirom/Amon2-Plugin-Web-CSRFDefender', 'vendor': 'TOKUHIROM', 'product': 'Amon2::Plugin::Web::CSRFDefender', 'versions': [{'status': 'affected', 'version': '7.00', 'versionType': 'custom', 'lessThanOrEqual': '7.03'}], 'packageName': 'Amon2-Plugin-Web-CSRFDefender', 'programFiles': ['lib/Amon2/Plugin/Web/CSRFDefender/Random.pm'], 'collectionURL': 'https://cpan.org/modules', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': 'Amon2::Plugin::Web::CSRFDefender::Random::generate_session_id'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-5082', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-08T16:09:08.752556Z'} -
Initial Analysis by [email protected]
Apr. 23, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:tokuhirom:amon2::plugin::web::csrfdefender:*:*:*:*:*:perl:*:* versions from (including) 7.00 up to (including) 7.03 Added Reference Type CPANSec: https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.03/source/lib/Amon2/Plugin/Web/CSRFDefender/Random.pm Types: Product Added Reference Type CPANSec: https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.04/changes Types: Release Notes Added Reference Type CPANSec: https://www.cve.org/CVERecord?id=CVE-2025-15604 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Apr. 08, 2026
Action Type Old Value New Value Added Description Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id. The generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. 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. Amon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604. Note that the author has deprecated this module. Added CWE CWE-338 Added CWE CWE-340 Added Reference https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.03/source/lib/Amon2/Plugin/Web/CSRFDefender/Random.pm Added Reference https://metacpan.org/release/TOKUHIROM/Amon2-Plugin-Web-CSRFDefender-7.04/changes Added Reference https://www.cve.org/CVERecord?id=CVE-2025-15604