# CVE-2023-26131: Algernon engine and themes vulnerable to Cross-site Scripting

Source: https://junglewise.ai/threats/cve-2023-26131-algernon-engine-and-themes-vulnerable-to-cross-site-scripting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-05-31  
License: CC BY 4.0 with a link back

CVE-2023-26131 · Severity: low · CVSS 3.1 · Published 2023-05-31

Algernon engine and themes vulnerable to Cross-site Scripting

Technologies: [github.com/xyproto/algernon (Go)](https://junglewise.ai/threats/technologies/github-com-xyproto-algernon). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2023-26131 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-26131 being exploited in the wild.

**How severe is CVE-2023-26131?** Low severity, with a CVSS score of 3.1, published 31 May 2023.

**Which products and versions are affected?** github.com/xyproto/algernon (Go) SEMVER:introduced=0,last_affected=1.15.2.

**Is there a fix for CVE-2023-26131?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2023-26131?** Check whether you run github.com/xyproto/algernon (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- github.com/xyproto/algernon (Go) SEMVER:introduced=0,last_affected=1.15.2

## Identifiers

- CVE-2023-26131
- GHSA-g47h-fgcw-g4ph

## Related threats

- [xyproto Algernon source disclosure via NTFS filename manipulation](https://junglewise.ai/threats/cve-2026-52792-xyproto-algernon-source-disclosure-via-ntfs-filename-manipulation)
- [GO-2026-5300 - Algernon: Auto-refresh SSE event server binds to all interfaces with Access-Control-Allow-Origin: * and…](https://junglewise.ai/threats/go-2026-5300-algernon-auto-refresh-sse-event-server-binds-to-all-459dcf1f)
- [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)
- [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)
- [xyproto Algernon information disclosure in single-file mode](https://junglewise.ai/threats/cve-2026-45728-xyproto-algernon-information-disclosure-in-single-file-mode)