CVE-2026-119705: Missing Auth (CVSS 5.3)

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — Exploit Prediction

0.0063

Probability of exploitation

0.50%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

References

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-119705? +

CVE-2026-119705 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0063, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-119705? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-119705