CVE-2026-40495

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-40495
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40495.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40495
Aliases
  • GHSA-gqcp-g7rm-p5v6
Published
2026-06-03T19:38:28.746Z
Modified
2026-08-04T11:48:43.724872719Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
FOSSBilling version exposed via asset cache buster
Details

FOSSBilling is a free, open-source billing and client management system. Versions prior to 0.8.0 leak the exact system version through asset cache buster parameters in HTML output, bypassing the hide_version_public security setting. The FOSSBilling version is embedded in the query string of every <script> and <link> tag generated by the script_tag and stylesheet_tag Twig filters. This information is visible to all visitors — including unauthenticated guests — on every page, regardless of whether the hide_version_public setting is enabled. The X-FOSSBilling-Version HTTP header and the guest.system.version API endpoint correctly honour the hide_version_public setting, but the asset cache buster parameters were overlooked. Knowledge of the exact FOSSBilling version makes it significantly easier for malicious actors to identify known vulnerabilities applicable to a given installation and craft targeted exploits. While not a direct vulnerability on its own, it undermines the intended protection offered by the hide_version_public setting and facilitates reconnaissance. Version 0.8.0 contains a patch. There is no practical workaround that removes the version from asset URLs without modifying source code.

Database specific 
{
    "cwe_ids": [
        "CWE-200"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40495.json"
}
References

Affected packages

Git / github.com/fossbilling/fossbilling

Affected ranges

Type
GIT
Repo
https://github.com/fossbilling/fossbilling
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3bd35f5b2921d8a26a403142ae0408f95e6463cc
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.8.0"
        }
    ]
}

Affected versions

0.*
0.1.0
0.1.1
0.2.0
0.2.1
0.2.10
0.2.2
0.2.3
0.2.4
0.2.5
0.2.6
0.2.7
0.2.8
0.2.9
0.3.0
0.4.0
0.4.1
0.4.2
0.4.3
0.5.0
0.5.1
0.5.2
0.5.3
0.5.4
0.5.5
0.6.0
0.6.1
0.6.10
0.6.11
0.6.12
0.6.13
0.6.14
0.6.15
0.6.16
0.6.17
0.6.18
0.6.19
0.6.2
0.6.20
0.6.21
0.6.22
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
0.7.0
0.7.1
0.7.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40495.json"