---
cve: "CVE-2026-56858"
severity: "MEDIUM"
cvss: 6.1
epss: "26%"
vendor: "Go standard library"
kev: false
exploited: false
published: "2026-08-13 22:17:22"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T08:21:17+02:00"
---

# CVE-2026-56858

> 6.1 MEDIUM

## Beschreibung

Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <https://go.dev/issue/80435>
- <https://go.dev/cl/807100>
- <https://groups.google.com/g/golang-announce/c/94pEornpRlI>
- <https://pkg.go.dev/vuln/GO-2026-6091>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56858) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_