Vulnerability-Lookup

CVE-2026-9733 (GCVE-0-2026-9733)

Vulnerability from cvelistv5 – Published: 2026-06-23 07:05 – Updated: 2026-06-23 14:18

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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-340 - Generation of Predictable Numbers or Identifiers
CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator

Assigner

CPANSec

References

4 references

URL	Tags
https://metacpan.org/release/HAYAJO/Mojolicious-P…
https://datatracker.ietf.org/doc/html/rfc6749#sec…	technical-description
https://security.metacpan.org/patches/M/Mojolicio…	patch
http://www.openwall.com/lists/oss-security/2026/06/23/1

Impacted products

1 product

Vendor	Product	Version
HAYAJO	Mojolicious::Plugin::Web::Auth::OAuth2	Affected: 0 , ≤ 0.17 (custom)

Show details on NVD website

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GHSA-RQ65-66G5-5PG2

Vulnerability from github – Published: 2026-06-23 09:32 – Updated: 2026-06-23 15:32

Details

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)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-9733"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-23T08:16:26Z",
    "severity": "CRITICAL"
  },
  "details": "Mojolicious::Plugin::Web::Auth::OAuth2 versions through 0.17 for Perl have an insecure default state parameter.\n\nWhen 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\u0027s built-in rand function.\n\nA predictable state allows an attacker to hijack another user\u0027s session through cross site request forgery (CSRF).",
  "id": "GHSA-rq65-66g5-5pg2",
  "modified": "2026-06-23T15:32:35Z",
  "published": "2026-06-23T09:32:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9733"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc6749#section-10.12"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/HAYAJO/Mojolicious-Plugin-Web-Auth-0.17/source/lib/Mojolicious/Plugin/Web/Auth/OAuth2.pm#L129-131"
    },
    {
      "type": "WEB",
      "url": "https://security.metacpan.org/patches/M/Mojolicious-Plugin-Web-Auth/0.17/CVE-2026-9733-r2.patch"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/23/1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-9733 (GCVE-0-2026-9733)

GHSA-RQ65-66G5-5PG2

Tags

Sightings

Nomenclature