What is CVE-2026-50635?

CVE-2026-50635 is a high-severity vulnerability in Limesurvey, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 8.8/10. Published 2026-06-09.

How severe is CVE-2026-50635?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Limesurvey

CVE-2026-50635

LimeSurvey constructs account password-reset links from the client-supplied HTTP Host header without validating it. The optional allowedHosts allowlist that would constrain this is undefined in the default (and documented) configuration, s…

EPSS: 0.004 (29.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Limesurvey — versions 0, 7.0.1

Weakness classification (CWE)

CWE-640 — Weak Password Recovery Mechanism for Forgotten Password

References

disclosure@vulncheck.com (issue-tracking, patch)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-50635?: CVE-2026-50635 is a high-severity vulnerability in Limesurvey, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 8.8/10. Published 2026-06-09.
How severe is CVE-2026-50635?: High severity. CVSS v3 base score is 8.8 out of 10.