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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/towfiqi/serpbear cve-icon cve-icon
https://github.com/towfiqi/serpbear/blob/v3.1.0/pages/api/notify.ts#L16-L21 cve-icon cve-icon
https://github.com/towfiqi/serpbear/commit/12dc0a4bd91f06de2dab96f797c495942f7ef8c9 cve-icon cve-icon
https://github.com/towfiqi/serpbear/issues/359 cve-icon cve-icon
https://github.com/towfiqi/serpbear/releases/tag/v3.1.1 cve-icon cve-icon
https://www.vulncheck.com/advisories/serpbear-before-3.1.1-missing-authentication-via-post-api-notify cve-icon cve-icon
History

Fri, 30 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 30 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title SerpBear before 3.1.1 Missing Authentication via POST /api/notify
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-30T18:36:44.022Z

Reserved: 2026-10-30T14:49:22.998Z

Link: CVE-2026-119705

cve-icon Vulnrichment

Updated: 2026-10-30T18:27:23.504Z

cve-icon NVD

Status : Deferred

Published: 2026-10-30T16:17:51.483

Modified: 2026-10-30T19:23:25.493

Link: CVE-2026-119705

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T16:45:15Z

Weaknesses