CVE-2026-82644 WWBN AVideo Brute-force Rate Limiting Bypass via Missing User-Agent
Attackers can bypass login rate limits by omitting the User-Agent header, enabling unlimited brute-force password guessing against AVideo accounts.
- 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-2026-82644?
CVE-2026-82644 is a high-severity vulnerability in WWBN AVideo, published on 30 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
WWBN AVideo (current e01e41ecc and earlier) contains a brute-force rate limiting bypass in enforceRateLimit(), which protects login.json.php and 13 other endpoints. The function stores its attempt counter via a cache layer (ObjectYPT::setCacheGlobal) that silently discards writes for any client identified as a bot by isBot(). Because isBot() treats a missing User-Agent header as a bot by default — and also matches common bot identifiers such as 'curl', 'bot', 'crawler', and 'spider' — the counter never increments for such clients, so the rate limit never fires. An unauthenticated attacker can therefore submit unlimited login attempts (e.g., by omitting the User-Agent header or using curl's default User-Agent), enabling unrestricted password-guessing attacks.
Weakness: CWE-307
Which versions are affected by CVE-2026-82644?
How do I fix CVE-2026-82644?
No fix has been published for CVE-2026-82644 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82644 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82644 exists.
Sources
Also known as GHSA-4m65-c7fj-mw98.