Vulnerability in Q2a Question2answer
CVE-2026-64829
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Q2a Question2answer — versions 0
Weakness classification (CWE)
References
- github.com/q2a/question2answer/pull/1017 (issue-tracking, patch)
- www.vulncheck.com/advisories/question2answer-session-fixation-via-forgot-passwo… (third-party-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-64829?
- CVE-2026-64829 is a high-severity vulnerability in Q2a Question2answer, classified under Insufficient Session Expiration. CVSS score: 7.4/10. Published 2026-07-22.
- How severe is CVE-2026-64829?
- High severity. CVSS v3 base score is 7.4 out of 10.