CVE-2026-2439

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Source

https://cve.org/CVERecord?id=CVE-2026-2439

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2439.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-2439

Published

2026-02-16T21:25:21.091Z

Modified

2026-07-15T01:48:59.833035439Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Concierge::Sessions versions from 0.8.1 before 0.8.5 for Perl generate insecure session ids

Details

Concierge::Sessions versions from 0.8.1 before 0.8.5 for Perl generate insecure session ids. The generatesessionid 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.

Database specific

{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "0.8.1"
                },
                {
                    "fixed": "0.8.5"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "0.8.1"
                },
                {
                    "fixed": "0.8.5"
                }
            ],
            "source": "DESCRIPTION"
        }
    ],
    "cwe_ids": [
        "CWE-338",
        "CWE-340"
    ],
    "cna_assigner": "CPANSec",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2439.json"
}

References

Affected packages

Git / github.com/bwva/concierge-sessions

Affected ranges

Type

GIT

Repo

https://github.com/bwva/concierge-sessions

Events

Introduced

Fixed

20bb28e92e8fba307c4ff8264701c215be65e73b

Database specific

{
    "source": "REFERENCES"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2439.json"