# Xyproto Algernon vulnerabilities

Source: https://junglewise.ai/threats/technologies/algernon  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 21:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/algernon.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 10 vulnerabilities in Xyproto Algernon: 1 in the last 7 days and 1 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-68548, was published on 12 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 1
- All time: 10 (2 critical, 0 exploited in the wild)

## About Xyproto Algernon

A HTTP/2 web server with built-in support for Lua, Markdown, SASS, and QUIC.

## Latest Xyproto Algernon vulnerabilities

- [CVE-2026-68548: Algernon URL-prefix authorization bypass on case-insensitive filesystems](https://junglewise.ai/threats/cve-2026-68548-algernon-is-a-small-self-contained-pure-go-web-server-prior-to) (critical, CVSS 9.4, published 12 Nov 2026)
- [CVE-2026-52792: xyproto Algernon source disclosure via NTFS filename manipulation](https://junglewise.ai/threats/cve-2026-52792-xyproto-algernon-source-disclosure-via-ntfs-filename-manipulation) (high, CVSS 4, published 2 Jul 2026)
- [CVE-2026-48126: xyproto Algernon path traversal and RCE via Host header](https://junglewise.ai/threats/cve-2026-48126-xyproto-algernon-path-traversal-and-rce-via-host-header) (high, CVSS 8.2, published 26 May 2026)
- [CVE-2026-46431: xyproto Algernon permissive CORS policy in SSE event server](https://junglewise.ai/threats/cve-2026-46431-xyproto-algernon-permissive-cors-policy-in-sse-event-server) (medium, CVSS 4.3, published 26 May 2026)
- [CVE-2026-45728: xyproto Algernon information disclosure in single-file mode](https://junglewise.ai/threats/cve-2026-45728-xyproto-algernon-information-disclosure-in-single-file-mode) (high, CVSS 7.5, published 26 May 2026)
- [CVE-2026-45721: xyproto Algernon remote code execution via handler.lua path traversal](https://junglewise.ai/threats/cve-2026-45721-xyproto-algernon-remote-code-execution-via-handler-lua-path) (critical, CVSS 9, published 26 May 2026)
- [CVE-2026-43982: xyproto Algernon path traversal in uploadedFileSaveIn](https://junglewise.ai/threats/cve-2026-43982-xyproto-algernon-path-traversal-in-uploadedfilesavein) (info, CVSS 8.7, published 26 May 2026)
- [CVE-2026-43981: xyproto Algernon race condition in Lua handler](https://junglewise.ai/threats/cve-2026-43981-xyproto-algernon-race-condition-in-lua-handler) (info, CVSS 8.2, published 26 May 2026)
- [CVE-2026-46430: xyproto Algernon insecure default bind address in SSE server](https://junglewise.ai/threats/cve-2026-46430-xyproto-algernon-insecure-default-bind-address-in-sse-server) (medium, CVSS 4.3, published 20 May 2026)
- [Xyproto Algernon missing authentication in auto-refresh SSE server](https://junglewise.ai/threats/xyproto-algernon-missing-authentication-in-auto-refresh-sse-server-2a3e2f07) (medium, CVSS 5.3, published 19 May 2026)

## Most severe Xyproto Algernon vulnerabilities

- [CVE-2026-68548: Algernon URL-prefix authorization bypass on case-insensitive filesystems](https://junglewise.ai/threats/cve-2026-68548-algernon-is-a-small-self-contained-pure-go-web-server-prior-to) (critical, CVSS 9.4, published 12 Nov 2026)
- [CVE-2026-45721: xyproto Algernon remote code execution via handler.lua path traversal](https://junglewise.ai/threats/cve-2026-45721-xyproto-algernon-remote-code-execution-via-handler-lua-path) (critical, CVSS 9, published 26 May 2026)
- [CVE-2026-48126: xyproto Algernon path traversal and RCE via Host header](https://junglewise.ai/threats/cve-2026-48126-xyproto-algernon-path-traversal-and-rce-via-host-header) (high, CVSS 8.2, published 26 May 2026)
- [CVE-2026-45728: xyproto Algernon information disclosure in single-file mode](https://junglewise.ai/threats/cve-2026-45728-xyproto-algernon-information-disclosure-in-single-file-mode) (high, CVSS 7.5, published 26 May 2026)
- [CVE-2026-52792: xyproto Algernon source disclosure via NTFS filename manipulation](https://junglewise.ai/threats/cve-2026-52792-xyproto-algernon-source-disclosure-via-ntfs-filename-manipulation) (high, CVSS 4, published 2 Jul 2026)
- [Xyproto Algernon missing authentication in auto-refresh SSE server](https://junglewise.ai/threats/xyproto-algernon-missing-authentication-in-auto-refresh-sse-server-2a3e2f07) (medium, CVSS 5.3, published 19 May 2026)
- [CVE-2026-46431: xyproto Algernon permissive CORS policy in SSE event server](https://junglewise.ai/threats/cve-2026-46431-xyproto-algernon-permissive-cors-policy-in-sse-event-server) (medium, CVSS 4.3, published 26 May 2026)
- [CVE-2026-46430: xyproto Algernon insecure default bind address in SSE server](https://junglewise.ai/threats/cve-2026-46430-xyproto-algernon-insecure-default-bind-address-in-sse-server) (medium, CVSS 4.3, published 20 May 2026)
- [CVE-2026-43982: xyproto Algernon path traversal in uploadedFileSaveIn](https://junglewise.ai/threats/cve-2026-43982-xyproto-algernon-path-traversal-in-uploadedfilesavein) (info, CVSS 8.7, published 26 May 2026)
- [CVE-2026-43981: xyproto Algernon race condition in Lua handler](https://junglewise.ai/threats/cve-2026-43981-xyproto-algernon-race-condition-in-lua-handler) (info, CVSS 8.2, published 26 May 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 1 | 1 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Xyproto Algernon vulnerabilities", https://junglewise.ai/threats/technologies/algernon, 12 November 2026.