Auth bypass in Towfiqi Serpbear
CVE-2026-119705
SerpBear before 3.1.1 contains a missing authentication vulnerability in pages/api/notify.ts that allows remote unauthenticated attackers to trigger notification emails because verifyUser() is never called. Attackers can repeatedly POST to /api/notify, optionally with a domain parameter, to exhaust SMTP rate limits, trigger provider abuse flags and flood recipients.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/towfiqi/serpbear/issues/359 (issue-tracking)
- github.com/towfiqi/serpbear (product)
- github.com/towfiqi/serpbear/commit/12dc0a4bd91f06de2dab96f797c495942f7ef8c9 (patch)
- github.com/towfiqi/serpbear/blob/v3.1.0/pages/api/notify.ts (technical-description)
- github.com/towfiqi/serpbear/releases/tag/v3.1.1 (release-notes)
- www.vulncheck.com/advisories/serpbear-before-3.1.1-missing-authentication-via-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119705?
- CVE-2026-119705 is a medium-severity vulnerability in Towfiqi Serpbear, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-10-30.
- How severe is CVE-2026-119705?
- Medium severity. CVSS v3 base score is 5.3 out of 10.