CVE-2026-68548

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Source
https://cve.org/CVERecord?id=CVE-2026-68548
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68548.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-68548
Aliases
  • GHSA-vm84-8c4p-64hx
Published
2026-11-12T19:39:10Z
Modified
2026-11-14T02:47:39Z
Severity
  • 9.4 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L CVSS Calculator
Summary
Algernon: Case-insensitive filesystem lets unauthenticated requests bypass /admin,/repo,/data permission-prefix gate
Details

Algernon is a small self-contained pure-Go web server. Prior to version 1.17.10, Algernon's URL-prefix authorization gate matches its protected prefixes (/admin, /repo, /data) with case-sensitive strings.HasPrefix, while the exact same raw req.URL.Path is later resolved against the filesystem. On case-insensitive filesystems (Windows NTFS — always; macOS APFS/HFS+ — default), a request for /Admin/secret.lua evades every protected-prefix check, falls through to the public-prefix accept branch, and then resolves on disk to admin/secret.lua. The result is an unauthenticated bypass of the /admin, /repo, and /data authorization boundary, enabling read (and, for Lua files, execution) of protected content. The permission system is active in the default configuration. This issue has been patched in version 1.17.10.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-178",
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68548.json"
}
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
505c79740bd08c171aefff0ce181daba9f3d1cfa
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.17.10"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "original_tag": "v1.17.10",
            "range": [
                {
                    "fixed": "505c79740bd08c171aefff0ce181daba9f3d1cfa"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.17.10"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

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
1.12.1
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
1.6
1.7
1.8
1.9
v1.*
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
v1.17.7
v1.17.8
v1.17.9
v1.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68548.json"