Detections
Analytics
SCA: security update for github.com/xyproto/algernon (GHSA-fwqx-8365-9983)
high Tenable Self-Hosted Container Security Plugin ID 442172
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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. (CVE-2026-45728)
Solution
Update the github.com/xyproto/algernon library and its related packages to version 1.17.7 or later.See Also
Plugin Details
Severity: High
ID: 442172
Version: Revision 1.4
Type: Local
Family: SCA Checks
Published: 5/19/2026
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.69
Vendor
Vendor Severity: High
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
CVSS Score Source: CVE-2026-45728
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 5/19/2026
Vulnerability Publication Date: 5/19/2026
Reference Information
CVE: CVE-2026-45728