CVE-2026-100501: Brute Force (CVSS 6.5)

Description

Flame through 2.4.0 contains an improper restriction of excessive authentication attempts vulnerability in the POST /api/auth login endpoint that allows unauthenticated attackers to brute-force the admin password. Attackers can submit unlimited password guesses without rate limiting, attempt counters, lockouts, or delays to gain full administrator access and modify application configuration.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0029

Probability of exploitation

0.20%

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-307 CWE-307

References

Other References

https://github.com/pawelmalak/flame https://github.com/pawelmalak/flame/blob/v2.4.0/.docker/Dockerfile#L28 https://github.com/pawelmalak/flame/blob/v2.4.0/controllers/auth/login.js#L11-L22 https://github.com/pawelmalak/flame/blob/v2.4.0/routes/auth.js#L7 https://github.com/pawelmalak/flame/issues/494 https://www.vulncheck.com/advisories/flame-through-2.4.0-brute-force-attack-via-login-endpoint

Frequently Asked Questions

What is CVE-2026-100501? +

Flame through 2.4.0 contains an improper restriction of excessive authentication attempts vulnerability in the POST /api/auth login endpoint that allows unauthenticated attackers to brute-force the admin password. Attackers can submit unlimited password guesses without rate limiting, attempt counters, lockouts, or delays to gain full administrator access and modify application configuration. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-100501? +

CVE-2026-100501 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0029, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-100501? +

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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