---
cve: "CVE-2026-42926"
severity: "MEDIUM"
cvss: 6.3
epss: "35%"
vendor: "F5"
kev: false
exploited: false
published: "2026-05-13 16:16:49"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T15:23:52+02:00"
---

# CVE-2026-42926

> 6.3 MEDIUM

## Beschreibung

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxy_http_version to 2, and also uses proxy_set_body, an attacker may be able to inject frame headers and payload bytes to the upstream peer.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://my.f5.com/manage/s/article/K000161131>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-42926) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_