CVE-2026-8503

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Source
https://cve.org/CVERecord?id=CVE-2026-8503
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8503.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8503
Downstream
Published
2026-05-15T11:06:29.777Z
Modified
2026-07-08T08:14:27.310659802Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Apache::Session::Generate::SHA256 versions before 1.3.19 for Perl create insecure session ids
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8503.json",
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-338",
        "CWE-340"
    ]
}
References

Affected packages

Git / github.com/lemonldapng/apache-session-browseable

Affected ranges

Type
GIT
Repo
https://github.com/lemonldapng/apache-session-browseable
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0dd14ad0706f22f8bcb3c4e2b33bcfe3e5b66513
Fixed
cc915cbbd266776eec3dd8bf4748b15fa827dbd0
Database specific 
{
    "cpe": "cpe:2.3:a:guimard:apache\\:\\:session\\:\\:generate\\:\\:sha256:*:*:*:*:*:perl:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.3.19"
        }
    ]
}

Affected versions

0.*
0.7
0.9
1.*
1.0
1.0.1
1.0.2
1.1
1.2
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
v1.*
v1.2.6
v1.2.7
v1.2.8
v1.2.9
v1.3.0
v1.3.1
v1.3.10
v1.3.11
v1.3.12
v1.3.13
v1.3.14
v1.3.15
v1.3.16
v1.3.17
v1.3.18
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.3.8
v1.3.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8503.json"