CVE-2026-111675 Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover
Unauthenticated attackers can brute force 6-digit verification codes to take over user accounts due to missing rate limits and code invalidation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111675?
CVE-2026-111675 is a critical authentication bypass vulnerability in xiaochong0302 course-tencent-cloud, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Course-tencent-cloud through 2.0.1 contains an improper restriction of authentication attempts vulnerability that allows unauthenticated attackers to brute force 6-digit SMS/email verification codes, which are never invalidated or attempt-limited. Attackers who know a victim's phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts.
Weakness: CWE-307
Which versions are affected by CVE-2026-111675?
How do I fix CVE-2026-111675?
No fix has been published for CVE-2026-111675 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-111675 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111675 exists.
Sources
Also known as GHSA-h2mg-h5vq-xqx3.