---
cve: "CVE-2026-75106"
severity: "CRITICAL"
cvss: 9.3
epss: "0.3%"
vendor: "OpnForm"
kev: false
exploited: false
published: "2026-08-17 21:16:49"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T12:56:17+02:00"
---

# CVE-2026-75106

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

OpnForm derives editable-submission secrets from sequential row identifiers using Hashids with an empty default salt, allowing unauthenticated attackers to compute hashes for any submission. Attackers can read other respondents' full submission data through the submission-fetch endpoint or overwrite submissions by supplying predicted hashes to the answer endpoint.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 6c67ff0a9bc0ac27ae26b32b8e108a176f8161b1 (Commit)
- b8f27f58a5893ff4eee3c4c2a24f0af77da0159f (Commit)

## Referenzen

- <https://github.com/OpnForm/OpnForm/issues/1259>
- <https://github.com/OpnForm/OpnForm>
- <https://github.com/OpnForm/OpnForm/commit/6c67ff0a9bc0ac27ae26b32b8e108a176f8161b1>
- <https://github.com/OpnForm/OpnForm/releases/tag/v2.0.2>
- <https://www.vulncheck.com/advisories/opnform-editable-submission-secret-derivation-via-empty-hashids-salt>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-75106) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_