---
cve: "CVE-2026-64829"
severity: "CRITICAL"
cvss: 9.1
epss: "0.4%"
vendor: "q2a"
kev: false
exploited: false
published: "2026-07-22 20:17:08"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T13:20:07+02:00"
---

# CVE-2026-64829

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

Question2Answer through 1.8.8 contains a session invalidation vulnerability that allows attackers with a previously obtained remember-me cookie to retain authenticated access by exploiting the forgot-password reset flow's failure to clear the sessioncode field in qa-include/app/users-edit.php. While the normal password-change flow in qa-include/pages/account.php explicitly clears the sessioncode to invalidate persistent qa_session cookies, the forgot-password handler qa_finish_reset_user() omits this step, allowing any valid persistent cookie issued before the reset to continue authenticating the account after the password reset completes.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/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 | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 5a43593b39778adc4331fdb3f23f7d81fe73e72f (Commit)

## Referenzen

- <https://github.com/q2a/question2answer/pull/1017>
- <https://www.vulncheck.com/advisories/question2answer-session-fixation-via-forgot-password-flow>
- <http://seclists.org/fulldisclosure/2026/Aug/32>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64829) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_