Cross-site scripting in github.com/xyproto/algernon/engine
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
All versions of the package github.com/xyproto/algernon/engine; all versions of the package github.com/xyproto/algernon/themes are vulnerable to Cross-site Scripting (XSS) via the themes.NoPage(filename, theme) function due to improper user input sanitization. Exploiting this vulnerability is possible when a file/resource is not found.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00691 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | github.com/xyproto/algernon/engine | all versions | — | No fix listed | CNA |
| — | github.com/xyproto/algernon/themes | all versions | — | No fix listed | CNA |
| — | github.com/xyproto/algernon (Go) | up to 1.15.2 | — | No fix listed | GHSA-g47h-fgcw-g4ph |
- github.com/xyproto/algernon/engine Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/xyproto/algernon/themes Vendor— Affected all versions Fixed in — No fix listed CNA
- github.com/xyproto/algernon (Go) Vendor— Affected up to 1.15.2 Fixed in — No fix listed GHSA-g47h-fgcw-g4ph
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:algernon_project:algernon:*:*:*:*:*:*:*:* | all versions | Vulnerable | Algernon Project |
- cpe:2.3:a:algernon_project:algernon:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Algernon Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-26131
- 2026-10-03 Alias added: GHSA-g47h-fgcw-g4ph
References
Other 7
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go%23L514
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/themes/html.go%23L145
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go%23L512
- https://github.com/xyproto/algernon
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go#L512
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/engine/handlers.go#L514
- https://github.com/xyproto/algernon/blob/aab484608651852d02a8a93f40baf53ed93e639a/themes/html.go#L145
More Algernon Project Algernon vulnerabilities
- TI-2025-40435 Cross Site Scripting vulnerability in Algernon v1.17.4 allows attackers to execute… CVSS 3.1MEDIUM 6.1
Sources
- CVE-2023-26131 · CVE Program
- CVE-2023-26131 · NVD
- FIRST EPSS
- GHSA-g47h-fgcw-g4ph · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences