CVE-2026-45728

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Source
https://cve.org/CVERecord?id=CVE-2026-45728
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45728.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-45728
Aliases
Published
2026-05-26T16:38:50.435Z
Modified
2026-07-08T08:13:30.188887868Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Algernon: Single-file mode unconditionally enables debug mode
Details

Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, when Algernon is invoked with a single file path instead of a directory, singleFileMode is set to true and debugMode is forcibly enabled. debugMode activates the PrettyError renderer, which on any Lua or template error response dumps the absolute path of the file that errored, complete byte contents of that file, and exception or parser error text. This response is served with HTTP 200 OK to whoever sent the request that triggered the error. Any client able to reach the server and able to provoke a runtime error in the served script obtains the full server-side source of that script and of any sibling Lua data file consulted during the request. This vulnerability is fixed in 1.17.7.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45728.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1188",
        "CWE-209",
        "CWE-489",
        "CWE-540"
    ]
}
References

Affected packages

Git / github.com/xyproto/algernon

Affected ranges

Type
GIT
Repo
https://github.com/xyproto/algernon
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ff4de121a2aecad8cd1dbebf1e10b468e7d33ee5
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.17.7"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

0.*
0.2
0.3
0.4
0.41
0.42
0.43
0.44
0.45
0.46
0.47
0.48
0.49
0.50
0.51
0.52
0.53
0.54
0.55
0.56
0.57
0.58
0.59
0.61
0.62
0.63
0.64
0.65
0.66
0.67
0.68
0.7
0.71
0.72
0.73
0.74
0.75
0.8
0.81
0.82
0.83
0.84
0.85
0.86
0.87
0.88
0.89
0.9
0.91
0.92
1.*
1.0
1.1
1.10
1.10.1
1.11.0
1.12.0
1.12.0-TLS-1.3
1.12.1
1.12.10
1.12.11
1.12.12
1.12.14
1.12.2
1.12.3
1.12.4
1.12.5
1.12.6
1.12.7
1.12.8
1.12.9
1.2
1.2.1
1.3
1.3.1
1.3.2
1.4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.5
1.5.1
1.5.1-static-linux64
1.6
1.7
1.8
1.9
v0.*
v0.47-win8-64
v0.52-win8-64
v0.62-win8-64
v0.84-win8-64
v0.85-win8-64
Other
v1
v1.*
v1.0-win8-64
v1.13.0
v1.14.0
v1.15.0
v1.15.1
v1.15.2
v1.15.3
v1.15.4
v1.15.5
v1.16.0
v1.17.0
v1.17.1
v1.17.2
v1.17.3
v1.17.4
v1.17.5
v1.17.6
v1.2.1-win8-64
v1.4.1-rpi3
v1.4.1-win8-64
v1.4.5-win8-64
v1.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45728.json"